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function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-K46T604G22'); </script> <link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=1176949257541686127&zx=82a7f4cd-b217-4761-bf81-053c33f91622' media='none' onload='if(media!='all')media='all'' rel='stylesheet'/><noscript><link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=1176949257541686127&zx=82a7f4cd-b217-4761-bf81-053c33f91622' rel='stylesheet'/></noscript> <meta name='google-adsense-platform-account' content='ca-host-pub-1556223355139109'/> <meta name='google-adsense-platform-domain' content='blogspot.com'/> </head> <body> <script type='text/javascript'> //<![CDATA[ var axel = Math.random() + ""; var a = axel * 10000000000000; document.write('<iframe src="https://2542116.fls.doubleclick.net/activityi;src=2542116;type=gblog;cat=googl0;ord=ord=' + a + '?" width="1" height="1" frameborder="0" style="display:none"></iframe>'); //]]> </script> <noscript> <img alt='' height='1' src='https://ad.doubleclick.net/ddm/activity/src=2542116;type=gblog;cat=googl0;ord=1?' width='1'/> </noscript>  <div class='header-outer'> <div class='header-inner'> <div class='section' id='header'><div class='widget Header' data-version='1' id='Header1'> <div class='header-left'> <div class='header-title'> <a class='google-logo' href='https://security.googleblog.com/'> <img height='50' src='https://www.gstatic.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png'/> </a> <a href='/.'> <h2> Security Blog </h2> </a> </div> <div class='header-desc'> The latest news and insights from Google on security and safety on the Internet </div> </div> </div></div> </div> </div>  <div class='cols-wrapper loading'> <div class='col-main-wrapper'> <div class='col-main'> <div class='section' id='main'><div class='widget Blog' data-version='1' id='Blog1'> <div class='post' data-id='84676768756351216' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html' itemprop='url' title='Fewer bugs, mo’ money'> Fewer bugs, mo’ money </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> September 30, 2014 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> <div> <i>Cross-posted on the <a href="http://blog.chromium.org/">Chromium Blog</a></i></div> <div> <br /></div> We work hard to keep you safe online. In Chrome, for instance, we warn users against malware and phishing and offer rewards for finding security bugs. Due in part to our collaboration with the research community, we’ve squashed more than 700 Chrome security bugs and have rewarded more than $1.25 million through our <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html">bug reward program</a>. But as Chrome has become more <a href="https://www.google.com/chrome/browser/features.html#security">secure</a>, it’s gotten even harder to find and exploit security bugs.<br /> <div> <br /></div> <div> This is a good problem to have! In recognition of the extra effort it takes to uncover vulnerabilities in Chrome, we’re increasing our reward levels. We’re also making some changes to be more transparent with researchers reporting a bug.<br /> <div> <div> <br /></div> <div> First, we’re increasing our usual reward pricing range to $500-$15,000 per bug, up from a previous published maximum of $5,000. This is accompanied with <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html#rewards">a clear breakdown of likely reward amounts</a> by bug type. As always, we reserve the right to reward above these levels for particularly great reports. (For example, <a href="http://googlechromereleases.blogspot.com/2014/09/stable-channel-update-for-chrome-os.html">last month</a> we awarded $30,000 for a very impressive report.)</div> <div> <br /></div> <div> Second, we’ll pay at the higher end of the range when researchers can provide an exploit to demonstrate a specific attack path against our users. Researchers now have an option to submit the vulnerability first and follow up with an exploit later. We believe that this a win-win situation for security and researchers: we get to patch bugs earlier and our contributors get to lay claim to the bugs sooner, lowering the chances of submitting a duplicate report.</div> <div> <br /></div> <div> Third, Chrome reward recipients will be listed in the <a href="https://www.google.com/about/appsecurity/hall-of-fame/reward/">Google Hall of Fame</a>, so you’ve got something to print out and hang on the fridge.</div> <div> <br /></div> <div> As a special treat, we’re going to back-pay valid submissions from July 1, 2014 at the increased reward levels we’re announcing today. Good times.</div> <div> <br /></div> <div> We’ve also <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html#faq">answered some new FAQs</a> on our rules page, including questions about our new Trusted Researcher program and a bit about our philosophy and alternative markets for zero-day bugs.</div> <div> <br /></div> <div> Happy bug hunting!</div> <div> <br /></div> <div> <span style="color: #666666;">Posted by Tim Willis, Hacker Philanthropist, Chrome Security Team</span></div> </div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> <div> <i>Cross-posted on the <a href="http://blog.chromium.org/">Chromium Blog</a></i></div> <div> <br /></div> We work hard to keep you safe online. In Chrome, for instance, we warn users against malware and phishing and offer rewards for finding security bugs. Due in part to our collaboration with the research community, we’ve squashed more than 700 Chrome security bugs and have rewarded more than $1.25 million through our <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html">bug reward program</a>. But as Chrome has become more <a href="https://www.google.com/chrome/browser/features.html#security">secure</a>, it’s gotten even harder to find and exploit security bugs.<br /> <div> <br /></div> <div> This is a good problem to have! In recognition of the extra effort it takes to uncover vulnerabilities in Chrome, we’re increasing our reward levels. We’re also making some changes to be more transparent with researchers reporting a bug.<br /> <div> <div> <br /></div> <div> First, we’re increasing our usual reward pricing range to $500-$15,000 per bug, up from a previous published maximum of $5,000. This is accompanied with <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html#rewards">a clear breakdown of likely reward amounts</a> by bug type. As always, we reserve the right to reward above these levels for particularly great reports. (For example, <a href="http://googlechromereleases.blogspot.com/2014/09/stable-channel-update-for-chrome-os.html">last month</a> we awarded $30,000 for a very impressive report.)</div> <div> <br /></div> <div> Second, we’ll pay at the higher end of the range when researchers can provide an exploit to demonstrate a specific attack path against our users. Researchers now have an option to submit the vulnerability first and follow up with an exploit later. We believe that this a win-win situation for security and researchers: we get to patch bugs earlier and our contributors get to lay claim to the bugs sooner, lowering the chances of submitting a duplicate report.</div> <div> <br /></div> <div> Third, Chrome reward recipients will be listed in the <a href="https://www.google.com/about/appsecurity/hall-of-fame/reward/">Google Hall of Fame</a>, so you’ve got something to print out and hang on the fridge.</div> <div> <br /></div> <div> As a special treat, we’re going to back-pay valid submissions from July 1, 2014 at the increased reward levels we’re announcing today. Good times.</div> <div> <br /></div> <div> We’ve also <a href="https://www.google.com/about/appsecurity/chrome-rewards/index.html#faq">answered some new FAQs</a> on our rules page, including questions about our new Trusted Researcher program and a bit about our philosophy and alternative markets for zero-day bugs.</div> <div> <br /></div> <div> Happy bug hunting!</div> <div> <br /></div> <div> <span style="color: #666666;">Posted by Tim Willis, Hacker Philanthropist, Chrome Security Team</span></div> </div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Google Online Security Blog:Fewer bugs, mo’ money&url=https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html&via=google'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='comment-container'> <i class='comment-img material-icons'>  </i> <span class='cmt_count_iframe_holder' data-count='0' data-onclick='javascript:window.open(this.href, "bloggerPopup", "toolbar=0,location=0,statusbar=1,menubar=0,scrollbars=yes,width=640,height=500"); return false;' data-post-url='https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html' data-url='https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html' style='color: #4184F3;'></span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://security.googleblog.com/2014/09/fewer-bugs-mo-money.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> </div> </div> </div> <div class='post' data-id='5523225134431796527' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://security.googleblog.com/2014/09/security-for-people.html' itemprop='url' title='Security for the people'> Security for the people </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> September 18, 2014 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> <i>Cross-posted on the <a href="http://google-opensource.blogspot.com/">Open Source Blog</a></i><div> <br /></div> <div> A <a href="http://www.pewinternet.org/2013/09/05/anonymity-privacy-and-security-online/">recent Pew study</a> found that 86% of people surveyed had taken steps to protect their security online. This is great—more security is always good. However, if people are indeed working to protect themselves, why are we still seeing incidents, breaches, and confusion? In many cases these problems recur because the technology that allows people to secure their communications, content and online activity is too hard to use. <div> <br /></div> <div> In other words, the tools for the job exist. But while many of these tools work technically, they don’t always work in ways that users expect. They introduce extra steps or are simply confusing and cumbersome. (“Is this a software bug, or am I doing something wrong?”) However elegant and intelligent the underlying technology (and much of it is truly miraculous), the results are in: if people can’t use it easily, many of them won’t. </div> <div> <br /></div> <div> We believe that people shouldn’t have to make a trade-off between security and ease of use. This is why we’re happy to support <a href="http://simplysecure.org/">Simply Secure</a>, a new organization dedicated to improving the usability and safety of open-source tools that help people secure their online lives. </div> <div> <br /></div> <div> Over the coming months, Simply Secure will be collaborating with open-source developers, designers, researchers, and others to take what’s there—groundbreaking work from efforts like <a href="https://whispersystems.org/">Open Whisper Systems</a>, <a href="https://guardianproject.info/">The Guardian Project</a>, <a href="https://otr.cypherpunks.ca/">Off-the-Record Messaging</a>, and more—and work to make them easier to understand and use. </div> <div> <br /></div> <div> We’re excited for a future where people won’t have to choose between ease and security, and where tools that allow people to secure their communications, content, and online activity are as easy as choosing to use them.<br /><br /><span style="color: #666666;">Posted by Meredith Whittaker, Open Source Research Lead and Ben Laurie, Senior Staff Security Engineer</span></div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> <i>Cross-posted on the <a href="http://google-opensource.blogspot.com/">Open Source Blog</a></i><div> <br /></div> <div> A <a href="http://www.pewinternet.org/2013/09/05/anonymity-privacy-and-security-online/">recent Pew study</a> found that 86% of people surveyed had taken steps to protect their security online. This is great—more security is always good. However, if people are indeed working to protect themselves, why are we still seeing incidents, breaches, and confusion? In many cases these problems recur because the technology that allows people to secure their communications, content and online activity is too hard to use. <div> <br /></div> <div> In other words, the tools for the job exist. But while many of these tools work technically, they don’t always work in ways that users expect. They introduce extra steps or are simply confusing and cumbersome. (“Is this a software bug, or am I doing something wrong?”) However elegant and intelligent the underlying technology (and much of it is truly miraculous), the results are in: if people can’t use it easily, many of them won’t. </div> <div> <br /></div> <div> We believe that people shouldn’t have to make a trade-off between security and ease of use. This is why we’re happy to support <a href="http://simplysecure.org/">Simply Secure</a>, a new organization dedicated to improving the usability and safety of open-source tools that help people secure their online lives. </div> <div> <br /></div> <div> Over the coming months, Simply Secure will be collaborating with open-source developers, designers, researchers, and others to take what’s there—groundbreaking work from efforts like <a href="https://whispersystems.org/">Open Whisper Systems</a>, <a href="https://guardianproject.info/">The Guardian Project</a>, <a href="https://otr.cypherpunks.ca/">Off-the-Record Messaging</a>, and more—and work to make them easier to understand and use. </div> <div> <br /></div> <div> We’re excited for a future where people won’t have to choose between ease and security, and where tools that allow people to secure their communications, content, and online activity are as easy as choosing to use them.<br /><br /><span style="color: #666666;">Posted by Meredith Whittaker, Open Source Research Lead and Ben Laurie, Senior Staff Security Engineer</span></div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Google Online Security Blog:Security for the people&url=https://security.googleblog.com/2014/09/security-for-people.html&via=google'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://security.googleblog.com/2014/09/security-for-people.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='comment-container'> <i class='comment-img material-icons'>  </i> <span class='cmt_count_iframe_holder' data-count='2' data-onclick='javascript:window.open(this.href, "bloggerPopup", "toolbar=0,location=0,statusbar=1,menubar=0,scrollbars=yes,width=640,height=500"); return false;' data-post-url='https://security.googleblog.com/2014/09/security-for-people.html' data-url='https://security.googleblog.com/2014/09/security-for-people.html' style='color: #4184F3;'></span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://security.googleblog.com/2014/09/security-for-people.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> </div> </div> </div> <div class='post' data-id='342719774361324764' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html' itemprop='url' title='Cleaning up after password dumps'> Cleaning up after password dumps </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> September 10, 2014 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> One of the unfortunate realities of the Internet today is a phenomenon known in security circles as “credential dumps”—the posting of lists of usernames and passwords on the web. We’re always monitoring for these dumps so we can respond quickly to protect our users. This week, we identified several lists claiming to contain Google and other Internet providers’ credentials.<br /><br /><div> We found that less than 2% of the username and password combinations might have worked, and our <a href="http://googleblog.blogspot.com/2013/02/an-update-on-our-war-against-account.html">automated anti-hijacking systems</a> would have blocked many of those login attempts. We’ve protected the affected accounts and have required those users to reset their passwords.</div> <div> <br /></div> <div> It’s important to note that in this case and in others, the leaked usernames and passwords were not the result of a breach of Google systems. Often, these credentials are obtained through a combination of other sources. </div> <div> <br />For instance, if you reuse the same username and password across websites, and one of those websites gets hacked, your credentials could be used to log into the others. Or attackers can use <a href="https://support.google.com/accounts/answer/1626737?hl=en&ref_topic=2402524">malware</a> or <a href="https://support.google.com/accounts/answer/75061?hl=en">phishing</a> schemes to capture login credentials.<br /><br />We’re constantly working to keep your accounts secure from phishing, malware and spam. For instance, if we see unusual account activity, we’ll stop sign-in attempts from unfamiliar locations and devices. You can <a href="https://security.google.com/settings/security/activity">review this activity</a> and confirm whether or not you actually took the action.<br /><br />A few final tips: Make sure you’re using a <a href="//www.google.com/goodtoknow/online-safety/passwords/">strong password</a> unique to Google. Update your <a href="https://accounts.google.com/UpdateAccountRecoveryOptions?hl=en&service=oz">recovery options</a> so we can reach you by phone or email if you get locked out of your account. And consider <a href="//g.co/2step">2-step verification</a>, which adds an extra layer of security to your account. You can visit <a href="//g.co/accountcheckup">g.co/accountcheckup</a> where you’ll see a list of many of the security controls at your disposal.<br /><br /><span style="color: #666666;">Posted by Borbala Benko, Elie Bursztein, Tadek Pietraszek and Mark Risher, Google Spam & Abuse Team</span></div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> One of the unfortunate realities of the Internet today is a phenomenon known in security circles as “credential dumps”—the posting of lists of usernames and passwords on the web. We’re always monitoring for these dumps so we can respond quickly to protect our users. This week, we identified several lists claiming to contain Google and other Internet providers’ credentials.<br /><br /><div> We found that less than 2% of the username and password combinations might have worked, and our <a href="http://googleblog.blogspot.com/2013/02/an-update-on-our-war-against-account.html">automated anti-hijacking systems</a> would have blocked many of those login attempts. We’ve protected the affected accounts and have required those users to reset their passwords.</div> <div> <br /></div> <div> It’s important to note that in this case and in others, the leaked usernames and passwords were not the result of a breach of Google systems. Often, these credentials are obtained through a combination of other sources. </div> <div> <br />For instance, if you reuse the same username and password across websites, and one of those websites gets hacked, your credentials could be used to log into the others. Or attackers can use <a href="https://support.google.com/accounts/answer/1626737?hl=en&ref_topic=2402524">malware</a> or <a href="https://support.google.com/accounts/answer/75061?hl=en">phishing</a> schemes to capture login credentials.<br /><br />We’re constantly working to keep your accounts secure from phishing, malware and spam. For instance, if we see unusual account activity, we’ll stop sign-in attempts from unfamiliar locations and devices. You can <a href="https://security.google.com/settings/security/activity">review this activity</a> and confirm whether or not you actually took the action.<br /><br />A few final tips: Make sure you’re using a <a href="//www.google.com/goodtoknow/online-safety/passwords/">strong password</a> unique to Google. Update your <a href="https://accounts.google.com/UpdateAccountRecoveryOptions?hl=en&service=oz">recovery options</a> so we can reach you by phone or email if you get locked out of your account. And consider <a href="//g.co/2step">2-step verification</a>, which adds an extra layer of security to your account. You can visit <a href="//g.co/accountcheckup">g.co/accountcheckup</a> where you’ll see a list of many of the security controls at your disposal.<br /><br /><span style="color: #666666;">Posted by Borbala Benko, Elie Bursztein, Tadek Pietraszek and Mark Risher, Google Spam & Abuse Team</span></div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Google Online Security Blog:Cleaning up after password dumps&url=https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html&via=google'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom social-wrapper' data-href='https://www.facebook.com/sharer.php?u=https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html'> <img alt='Share on Facebook' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_facebook_black_24dp.png' width='24'/> </span> </div> <div class='comment-container'> <i class='comment-img material-icons'>  </i> <span class='cmt_count_iframe_holder' data-count='2' data-onclick='javascript:window.open(this.href, "bloggerPopup", "toolbar=0,location=0,statusbar=1,menubar=0,scrollbars=yes,width=640,height=500"); return false;' data-post-url='https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html' data-url='https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html' style='color: #4184F3;'></span> </div> <div class='post-footer'> <div class='cmt_iframe_holder' data-href='https://security.googleblog.com/2014/09/cleaning-up-after-password-dumps.html' data-viewtype='FILTERED_POSTMOD'></div> <a href='https://plus.google.com/112374322230920073195' rel='author' style='display:none;'> Google </a> <div class='label-footer'> </div> </div> </div> <div class='post' data-id='2256772779285653579' itemscope='' itemtype='http://schema.org/BlogPosting'> <h2 class='title' itemprop='name'> <a href='https://security.googleblog.com/2014/09/gradually-sunsetting-sha-1.html' itemprop='url' title='Gradually sunsetting SHA-1'> Gradually sunsetting SHA-1 </a> </h2> <div class='post-header'> <div class='published'> <span class='publishdate' itemprop='datePublished'> September 5, 2014 </span> </div> </div> <div class='post-body'> <div class='post-content' itemprop='articleBody'> <script type='text/template'> <div> <i>Cross-posted on the <a href="http://blog.chromium.org/2014/09/gradually-sunsetting-sha-1.html">Chromium Blog</a></i></div> <div> <br /></div> The SHA-1 cryptographic hash algorithm has been known to be considerably weaker than it was designed to be <a href="https://www.schneier.com/blog/archives/2005/02/cryptanalysis_o.html">since at least 2005</a> — 9 years ago. <a href="https://www.schneier.com/blog/archives/2012/10/when_will_we_se.html">Collision attacks against SHA-1 are too affordable</a> for us to consider it safe for the public web PKI. We can only expect that attacks will get cheaper.<br /> <br /> That’s why Chrome will start the process of sunsetting SHA-1 (as used in certificate signatures for HTTPS) with Chrome 39 in November. HTTPS sites whose certificate chains use SHA-1 and are valid past 1 January 2017 will no longer appear to be fully trustworthy in Chrome’s user interface.<br /> <br /> SHA-1's use on the Internet has been deprecated since 2011, when the CA/Browser Forum, an industry group of leading web browsers and certificate authorities (CAs) working together to establish basic security requirements for SSL certificates, published their <a href="https://cabforum.org/baseline-requirements-documents/">Baseline Requirements for SSL</a>. These Requirements recommended that all CAs transition away from SHA-1 as soon as possible, and followed similar events in other industries and sectors, such as <a href="http://www.nist.gov/">NIST</a> deprecating SHA-1 for government use in 2010.<br /> <br /> We have seen this type of weakness turn into a practical attack before, with <a href="http://www.win.tue.nl/hashclash/rogue-ca/">the MD5 hash algorithm</a>. We need to ensure that by the time an attack against SHA-1 is demonstrated publicly, the web has already moved away from it. Unfortunately, this can be quite challenging. For example, when Chrome disabled MD5, a number of enterprises, schools, and small businesses were affected when their proxy software — <a href="https://code.google.com/p/chromium/issues/detail?id=120715">from leading vendors</a> — continued to use the insecure algorithms, and were left <a href="https://code.google.com/p/chromium/issues/detail?id=107845">scrambling for updates</a>. Users who used personal firewall software were also affected.<br /> <br /> We plan to surface, in the HTTPS security indicator in Chrome, the fact that SHA-1 does not meet its design guarantee. We are taking a measured approach, gradually ratcheting down the security indicator and gradually moving the timetable up (keep in mind that we release stable versions of Chrome about 6-8 weeks after their branch point):<br /> <b><u><br /></u></b> <div> <b><u>Chrome 39 (Branch point 26 September 2014)</u></b><br /> <div> Sites with end-entity (“leaf”) certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”. <br /> <br /> The current visual display for “secure, but with minor errors” is a lock with a yellow triangle, and is <a href="https://support.google.com/chrome/answer/95617?hl=en">used to highlight other deprecated and insecure practices</a>, such as passive mixed content.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjh4NRz3kd0RS7CE0rRwnhtWz4WO-wlgj1HHKKoMjxZ5L29QieQIz54yNzT5MESWE11mM4lYc0MzZRKMg8A_2rdlMiqSjpaXd6CirExd7NYvINANOPIes9sxeIFIMnt5MfaWp0GEsH49L6C/s1600/yellow-triangle.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="107" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjh4NRz3kd0RS7CE0rRwnhtWz4WO-wlgj1HHKKoMjxZ5L29QieQIz54yNzT5MESWE11mM4lYc0MzZRKMg8A_2rdlMiqSjpaXd6CirExd7NYvINANOPIes9sxeIFIMnt5MfaWp0GEsH49L6C/s320/yellow-triangle.png" width="320" /></a></div> <br /></div> <br /> <b><u>Chrome 40 (Branch point 7 November 2014; Stable after holiday season)</u></b></div> <div> Sites with end-entity certificates that expire between 1 June 2016 to 31 December 2016 (inclusive), and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”.<br /> <div> <br /> Sites with end-entity certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “neutral, lacking security”. <br /> <br /> The current visual display for “neutral, lacking security” is a blank page icon, and is used in other situations, such as HTTP.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnsEh5dlzYzH0ftQl4daT96AmA6X-gVCTLPQN_uBZxaTqGjqfU4DSpGXYMxsyGd-R7q7bfYNeDGa9PC6fm66lMbGGKBuTZsH3_JKVF0CiZdeT4iPRvwIlRbaZal0uolvSBKjtO_LXluA0Z/s1600/Screen+Shot+2014-09-05+at+12.05.52+PM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="99" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnsEh5dlzYzH0ftQl4daT96AmA6X-gVCTLPQN_uBZxaTqGjqfU4DSpGXYMxsyGd-R7q7bfYNeDGa9PC6fm66lMbGGKBuTZsH3_JKVF0CiZdeT4iPRvwIlRbaZal0uolvSBKjtO_LXluA0Z/s320/Screen+Shot+2014-09-05+at+12.05.52+PM.png" width="320" /></a></div> <br /></div> <div> <b><u>Chrome 41 (Branch point in Q1 2015)</u></b></div> </div> <div> Sites with end-entity certificates that expire between 1 January 2016 and 31 December 2016 (inclusive), and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”.<br /> <div> <br /> Sites with end-entity certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “affirmatively insecure”. Subresources from such domain will be treated as “active mixed content”. <br /> <br /> The current visual display for “affirmatively insecure” is a lock with a red X, and a red strike-through text treatment in the URL scheme.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9kFzm-0PEjjyBFtRD24g0qDBKePiQA547lTrIxvuI6I5oVpeHhQp0uZ5vG-2qgMp557C2mrD25knh4pqcWlBDSHyjg9geUe6Dk7_CwrqCbvy-EX1bVbkbRlJDoykK7NGB1mj4Ur-ubhkv/s1600/Screen+Shot+2014-08-29+at+1.26.59+PM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="83" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9kFzm-0PEjjyBFtRD24g0qDBKePiQA547lTrIxvuI6I5oVpeHhQp0uZ5vG-2qgMp557C2mrD25knh4pqcWlBDSHyjg9geUe6Dk7_CwrqCbvy-EX1bVbkbRlJDoykK7NGB1mj4Ur-ubhkv/s320/Screen+Shot+2014-08-29+at+1.26.59+PM.png" width="320" /></a></div> <br /></div> <i>Note: SHA-1-based signatures for trusted root certificates are not a problem because TLS clients trust them by their identity, rather than by the signature of their hash.</i></div> <div> <span style="color: #666666;"><br /></span></div> <div> <span style="color: #666666;">Posted by Chris Palmer, Secure Socket Lover and Ryan Sleevi, Transport Layer Securer</span></div> </div> </div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </script> <noscript> <div> <i>Cross-posted on the <a href="http://blog.chromium.org/2014/09/gradually-sunsetting-sha-1.html">Chromium Blog</a></i></div> <div> <br /></div> The SHA-1 cryptographic hash algorithm has been known to be considerably weaker than it was designed to be <a href="https://www.schneier.com/blog/archives/2005/02/cryptanalysis_o.html">since at least 2005</a> — 9 years ago. <a href="https://www.schneier.com/blog/archives/2012/10/when_will_we_se.html">Collision attacks against SHA-1 are too affordable</a> for us to consider it safe for the public web PKI. We can only expect that attacks will get cheaper.<br /> <br /> That’s why Chrome will start the process of sunsetting SHA-1 (as used in certificate signatures for HTTPS) with Chrome 39 in November. HTTPS sites whose certificate chains use SHA-1 and are valid past 1 January 2017 will no longer appear to be fully trustworthy in Chrome’s user interface.<br /> <br /> SHA-1's use on the Internet has been deprecated since 2011, when the CA/Browser Forum, an industry group of leading web browsers and certificate authorities (CAs) working together to establish basic security requirements for SSL certificates, published their <a href="https://cabforum.org/baseline-requirements-documents/">Baseline Requirements for SSL</a>. These Requirements recommended that all CAs transition away from SHA-1 as soon as possible, and followed similar events in other industries and sectors, such as <a href="http://www.nist.gov/">NIST</a> deprecating SHA-1 for government use in 2010.<br /> <br /> We have seen this type of weakness turn into a practical attack before, with <a href="http://www.win.tue.nl/hashclash/rogue-ca/">the MD5 hash algorithm</a>. We need to ensure that by the time an attack against SHA-1 is demonstrated publicly, the web has already moved away from it. Unfortunately, this can be quite challenging. For example, when Chrome disabled MD5, a number of enterprises, schools, and small businesses were affected when their proxy software — <a href="https://code.google.com/p/chromium/issues/detail?id=120715">from leading vendors</a> — continued to use the insecure algorithms, and were left <a href="https://code.google.com/p/chromium/issues/detail?id=107845">scrambling for updates</a>. Users who used personal firewall software were also affected.<br /> <br /> We plan to surface, in the HTTPS security indicator in Chrome, the fact that SHA-1 does not meet its design guarantee. We are taking a measured approach, gradually ratcheting down the security indicator and gradually moving the timetable up (keep in mind that we release stable versions of Chrome about 6-8 weeks after their branch point):<br /> <b><u><br /></u></b> <div> <b><u>Chrome 39 (Branch point 26 September 2014)</u></b><br /> <div> Sites with end-entity (“leaf”) certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”. <br /> <br /> The current visual display for “secure, but with minor errors” is a lock with a yellow triangle, and is <a href="https://support.google.com/chrome/answer/95617?hl=en">used to highlight other deprecated and insecure practices</a>, such as passive mixed content.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjh4NRz3kd0RS7CE0rRwnhtWz4WO-wlgj1HHKKoMjxZ5L29QieQIz54yNzT5MESWE11mM4lYc0MzZRKMg8A_2rdlMiqSjpaXd6CirExd7NYvINANOPIes9sxeIFIMnt5MfaWp0GEsH49L6C/s1600/yellow-triangle.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="107" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjh4NRz3kd0RS7CE0rRwnhtWz4WO-wlgj1HHKKoMjxZ5L29QieQIz54yNzT5MESWE11mM4lYc0MzZRKMg8A_2rdlMiqSjpaXd6CirExd7NYvINANOPIes9sxeIFIMnt5MfaWp0GEsH49L6C/s320/yellow-triangle.png" width="320" /></a></div> <br /></div> <br /> <b><u>Chrome 40 (Branch point 7 November 2014; Stable after holiday season)</u></b></div> <div> Sites with end-entity certificates that expire between 1 June 2016 to 31 December 2016 (inclusive), and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”.<br /> <div> <br /> Sites with end-entity certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “neutral, lacking security”. <br /> <br /> The current visual display for “neutral, lacking security” is a blank page icon, and is used in other situations, such as HTTP.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnsEh5dlzYzH0ftQl4daT96AmA6X-gVCTLPQN_uBZxaTqGjqfU4DSpGXYMxsyGd-R7q7bfYNeDGa9PC6fm66lMbGGKBuTZsH3_JKVF0CiZdeT4iPRvwIlRbaZal0uolvSBKjtO_LXluA0Z/s1600/Screen+Shot+2014-09-05+at+12.05.52+PM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="99" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnsEh5dlzYzH0ftQl4daT96AmA6X-gVCTLPQN_uBZxaTqGjqfU4DSpGXYMxsyGd-R7q7bfYNeDGa9PC6fm66lMbGGKBuTZsH3_JKVF0CiZdeT4iPRvwIlRbaZal0uolvSBKjtO_LXluA0Z/s320/Screen+Shot+2014-09-05+at+12.05.52+PM.png" width="320" /></a></div> <br /></div> <div> <b><u>Chrome 41 (Branch point in Q1 2015)</u></b></div> </div> <div> Sites with end-entity certificates that expire between 1 January 2016 and 31 December 2016 (inclusive), and which include a SHA-1-based signature as part of the certificate chain, will be treated as “secure, but with minor errors”.<br /> <div> <br /> Sites with end-entity certificates that expire on or after 1 January 2017, and which include a SHA-1-based signature as part of the certificate chain, will be treated as “affirmatively insecure”. Subresources from such domain will be treated as “active mixed content”. <br /> <br /> The current visual display for “affirmatively insecure” is a lock with a red X, and a red strike-through text treatment in the URL scheme.<br /> <div style="text-align: center;"> <div class="separator" style="clear: both; text-align: center;"> <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9kFzm-0PEjjyBFtRD24g0qDBKePiQA547lTrIxvuI6I5oVpeHhQp0uZ5vG-2qgMp557C2mrD25knh4pqcWlBDSHyjg9geUe6Dk7_CwrqCbvy-EX1bVbkbRlJDoykK7NGB1mj4Ur-ubhkv/s1600/Screen+Shot+2014-08-29+at+1.26.59+PM.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="83" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9kFzm-0PEjjyBFtRD24g0qDBKePiQA547lTrIxvuI6I5oVpeHhQp0uZ5vG-2qgMp557C2mrD25knh4pqcWlBDSHyjg9geUe6Dk7_CwrqCbvy-EX1bVbkbRlJDoykK7NGB1mj4Ur-ubhkv/s320/Screen+Shot+2014-08-29+at+1.26.59+PM.png" width="320" /></a></div> <br /></div> <i>Note: SHA-1-based signatures for trusted root certificates are not a problem because TLS clients trust them by their identity, rather than by the signature of their hash.</i></div> <div> <span style="color: #666666;"><br /></span></div> <div> <span style="color: #666666;">Posted by Chris Palmer, Secure Socket Lover and Ryan Sleevi, Transport Layer Securer</span></div> </div> </div> </div> <span itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://plus.google.com/116899029375914044550' itemprop='url'/> </span> </noscript> </div> </div> <div class='share'> <span class='twitter-custom social-wrapper' data-href='http://twitter.com/share?text=Google Online Security Blog:Gradually sunsetting SHA-1&url=https://security.googleblog.com/2014/09/gradually-sunsetting-sha-1.html&via=google'> <img alt='Share on Twitter' height='24' src='https://www.gstatic.com/images/icons/material/system/2x/post_twitter_black_24dp.png' width='24'/> </span> <span class='fb-custom 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href='https://security.googleblog.com/search/label/chrome'> chrome </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/chrome%20enterprise'> chrome enterprise </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/chrome%20security'> chrome security </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/connected%20devices'> connected devices </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/CTF'> CTF </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/diversity'> diversity </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/encryption'> encryption </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/federated%20learning'> federated learning </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/fuzzing'> fuzzing </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/Gboard'> Gboard </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/google%20play'> google play </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/google%20play%20protect'> google play protect </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/hacking'> hacking </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/interoperability'> interoperability </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/iot%20security'> iot security </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/kubernetes'> kubernetes </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/linux%20kernel'> linux kernel </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/memory%20safety'> memory safety </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/Open%20Source'> Open Source </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/pha%20family%20highlights'> pha family highlights </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/pixel'> pixel </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/privacy'> privacy </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/private%20compute%20core'> private compute core </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/Rowhammer'> Rowhammer </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/rust'> rust </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/Security'> Security </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/security%20rewards%20program'> security rewards program </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/sigstore'> sigstore </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/spyware'> spyware </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/supply%20chain'> supply chain </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/targeted%20spyware'> targeted spyware </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/tensor'> tensor </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/Titan%20M2'> Titan M2 </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/VDP'> VDP </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/vulnerabilities'> vulnerabilities </a> </li> <li> <a dir='ltr' href='https://security.googleblog.com/search/label/workshop'> workshop </a> </li> </ul> <div class='clear'></div> </div> </div><div class='widget BlogArchive' 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class='post-count-link' href='https://security.googleblog.com/2019/'> 2019 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2019/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2018/'> 2018 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2018/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2017/'> 2017 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2017/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2016/'> 2016 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2016/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2015/'> 2015 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2015/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy toggle-open'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2014/'> 2014 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate expanded'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/07/'> Jul </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2014/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2013/'> 2013 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2013/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2012/'> 2012 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/08/'> Aug </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/06/'> Jun </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/05/'> May </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/04/'> Apr </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/03/'> Mar </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/02/'> Feb </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2012/01/'> Jan </a> </div> <div class='items'> </div> </li> </ul> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class='intervalToggle'> <span class='new-toggle' href='javascript:void(0)'> <i class='material-icons arrow'>  </i> </span> <a class='toggle' href='javascript:void(0)' style='display: none'> <span class='zippy'> <i class='material-icons'>  </i>   </span> </a> <a class='post-count-link' href='https://security.googleblog.com/2011/'> 2011 </a> </div> <div class='items'> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2011/12/'> Dec </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2011/11/'> Nov </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2011/10/'> Oct </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' href='https://security.googleblog.com/2011/09/'> Sep </a> </div> <div class='items'> </div> </li> </ul> <ul class='hierarchy'> <li class='archivedate collapsed'> <div class=''> <a class='post-count-link' 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