Will your computer's "Secure Boot" turn out to be "Restricted Boot"? — Free Software Foundation

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</span> </span> <span id="breadcrumbs-1" dir="ltr"> <a href="https://www.fsf.org/campaigns">Campaigns</a> <span class="breadcrumbSeparator"> &rsaquo; </span> </span> <span id="breadcrumbs-2" dir="ltr"> <span id="breadcrumbs-current">Secure Boot vs Restricted Boot</span> </span> </div></div> <div class=""> <dl class="portalMessage info" id="kssPortalMessage" style="display:none"> <dt>Info</dt> <dd></dd> </dl> <article> <div id="content"> <div id="viewlet-above-content-title"></div> <h1 id="parent-fieldname-title" class="documentFirstHeading"> Will your computer's "Secure Boot" turn out to be "Restricted Boot"? </h1> <div id="viewlet-below-content-title"><div class="documentByLine" id="plone-document-byline"> <span class="documentAuthor"> by <a href="https://www.fsf.org/author/jgay">Joshua Gay</a> <a href="https://www.fsf.org/contribs/jgay" class="netscape4"> Contributions </a> </span> <span class="documentModified"> — <span> Published on </span> Oct 12, 2011 06:20 PM </span> </div></div> <div id="viewlet-above-content-body"> </div> <div id="content-core"> <div class="" id="parent-fieldname-text-6e5ea849ac0d02267e0c269510d5e96f"> <link rel="stylesheet" type="text/css" href="//static.fsf.org/nosvn/plone3/css/hide-date.css"> <p><br /><strong>To respect user freedom and truly protect user security, computer makers must either provide users a way of disabling boot restrictions, or provide a sure-fire way that allows the computer user to install a free software operating system of her choice.</strong></p> <p>Microsoft has announced that if computer makers wish to distribute machines with the Windows 8 compatibility logo, they will have to implement a measure called "Secure Boot." However, it is currently up for grabs whether this technology will live up to its name, or will instead earn the name Restricted Boot.</p> <p><strong><a href="https://www.fsf.org/campaigns/secure-boot-vs-restricted-boot/statement">Please sign our statement to show your support!</a></strong></p> <p>When done correctly, "Secure Boot" is designed to protect against malware by preventing computers from loading unauthorized binary programs when booting. In practice, this means that computers implementing it won't boot unauthorized operating systems -- including initially authorized systems that have been modified without being re-approved.</p> <p>This could be a feature deserving of the name, as long as the <em>user</em> is able to authorize the programs she wants to use, so she can run free software written and modified by herself or people she trusts. However, we are concerned that Microsoft and hardware manufacturers will implement these boot restrictions in a way that will prevent users from booting anything other than Windows. In this case, a better name for the technology might be Restricted Boot, since such a requirement would be a disastrous restriction on computer users and not a security feature at all.</p> <p>The potential Restricted Boot requirement comes as part of a specification called the <a href="http://www.uefi.org/specs/">Unified Extensible Firmware Interface (UEFI)</a>, which defines an interface between computer hardware and the software it runs. It is software that allows your computer to boot, and it is intended to replace the traditional BIOS. Most Lenovo, HP, and Dell computers ship with UEFI, and other manufacturers are not far behind. All Apple computers ship with EFI and components from UEFI. When booting, this software starts a chain which, using a public key cryptography-based authentication protocol, can check your operating system's kernel and other components to make sure they have not been modified in unauthorized ways. If the components fail the check, then the computer won't boot.</p> <p>The threat is not the UEFI specification itself, but in how computer manufacturers choose to implement the boot restrictions. Depending on a manufacturer's implementation, they could lock users out of their own computers, preventing them from ever booting into or installing a free software operating system.</p> <p>It is essential that manufacturers get their implementation of UEFI right. To respect user freedom and truly protect user security, they must either provide users a way of disabling the boot restrictions, or provide a sure-fire way that allows the computer user to install a free software operating system of her choice. Computer users must not be required to seek external authorization to exercise their <a href="http://www.gnu.org/philosophy/free-sw.html">freedoms</a>. Further, he or she must be able to replace the bootloader and firmware altogether. The <a href="/campaigns/free-bios.html">coreboot</a> project is an example of a free software alternative to proprietary BIOS and bootloaders.</p> <p>The alternative is frightening and unacceptable: users would have to go through complicated and risky measures to circumvent the restrictions; the popular trend of reviving old hardware with GNU/Linux would come to an end, causing more hardware to be tossed in landfills; and proprietary operating system companies would gain a giant advantage over the free software movement, because of their connections with manufacturers.</p> <p>We will be monitoring developments in this area closely, and actively campaigning to make sure this important freedom is protected. Our first step is to demonstrate that people value this freedom, and will not purchase or recommend computers that attempt to restrict it. </p> <p><ul> <li>Please sign our <a href="https://www.fsf.org/campaigns/secure-boot-vs-restricted-boot/statement">statement</a> to show your support!</li> <li>Read our white paper, <a href="https://www.fsf.org/campaigns/secure-boot-vs-restricted-boot/whitepaper-web"><em>Free Software Foundation recommendations for free operating system distributions considering Secure Boot</em></a> (<a href="https://www.fsf.org/campaigns/secure-boot-vs-restricted-boot/campaigns/secure-boot-vs-restricted-boot/whitepaper.pdf">PDF</a>) <em>Please note this white paper will be updated in the near future to <a href="/blogs/community/update-on-the-effort-to-defeat-restricted-boot">reflect Ubuntu's decision to use GRUB2 as its bootloader</a>.</em> </li> <li>See the <a href="/news/fsf-announces-winner-of-restricted-boot-webcomic-contest"> winning entry</a> of our webcomic contest.</li></ul></p> <p>You can also stay up-to-date on this issue by:</p> <ul> <li>Subscribing to the monthly <a href="http://www.fsf.org/free-software-supporter/subscribe">Free Software Supporter</a></li> <li>Following us on <a href="http://status.fsf.org/fsf">GNU Social @fsf</a></li> <li>Reading our <a href="http://www.fsf.org/blogs/recent-blog-posts">blogs</a> or subscribing to our <a href="http://static.fsf.org/fsforg/rss/">RSS feeds</a></li> </ul> <h2>Learn more about Windows 8, UEFI, and boot restrictions</h2> <h3>Resources</h3> <ul> <li><a href="http://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface">English Wikipedia UEFI overview</a></li> <li><a href="http://www.uefi.org/specs/">UEFI Specifications</a></li> <li><a href="http://blog.canonical.com/2011/10/28/white-paper-secure-boot-impact-on-linux/">White Paper: Secure Boot impact on GNU/Linux</a>, a joint publication between Red Hat & Canonical.</li></ul> <h3>News and Blogs</h3> <ul> <li><a href="http://mjg59.livejournal.com/138973.html">UEFI secure booting</a>, by Matthew Garrett; in addition to providing a brief overview of Restricted Boot, this article explains specifically why dual-booting an operating system may be difficult, or at times virtually impossible, for systems implementing and using Restricted Boot.</li> <li><a href="http://www.lightbluetouchpaper.org/2011/09/20/trusted-computing-2-0/">Trusted Computing 2.0</a>, by Ross Anderson of the Security Research, Computer Laboratory, University of Cambridge.</li> <li><a href="http://blogs.msdn.com/b/b8/archive/2011/09/22/protecting-the-pre-os-environment-with-uefi.aspx">Protecting the pre-OS environment with UEFI</a>, Tony Mangefeste of Microsoft — a response to Garrett, et al.</li> <li><a href="http://mjg59.dreamwidth.org/5850.html">UEFI secure booting (part 2)</a>, by Matthew Garrett — a follow-up to Microsoft's blog post. </li> <li><a href="http://arstechnica.com/business/news/2011/09/windows-8-secure-boot-will-complicate-linux-installs.ars">ArsTechnica article</a> </li> <li><a href="http://mjg59.livejournal.com/139356.html">Supporting UEFI secure boot on GNU/Linux: the details</a>, by Matthew Garrett</li> <li>On November 2, 2011, ZDNet blogger, Ed Bott, <a href="http://www.zdnet.com/blog/bott/leading-pc-makers-confirm-no-windows-8-plot-to-lock-out-linux/4185">reports</a>: <ul><li>A Dell spokesperson stated that, “Dell has plans to make SecureBoot an enable/disable option in BIOS setup.”</li> <li>HP has only stated that, “HP will continue to offer its customers a choice of operating systems. We are working with industry partners to evaluate the options that will best serve our customers.”</li></ul></li></ul> <p><i>Read this page in <a href="https://edit.fsf.org/es/el-arranque-seguro-de-su-equipo-se-volvera-arranque-restringido">Spanish</a>.</i></p> </p> </div> </div> <div id="viewlet-below-content-body"><div class="visualClear"></div> <div class="documentActions"> <h5 class="hiddenStructure">Document Actions</h5> <ul> <li><b><a href="/share?u=https://www.fsf.org/campaigns/secure-boot-vs-restricted-boot/about&t=Will your computer's "Secure Boot" turn out to be "Restricted Boot"?">Share on social networks</a></b></li> <li>Syndicate:</li> <li><a href="/static/fsforg/rss/news.xml">News</a></li> <li><a href="/static/fsforg/rss/events.xml">Events</a></li> <li><a href="/static/fsforg/rss/blogs.xml">Blogs</a></li> <li><a href="/static/fsforg/rss/jobs.xml">Jobs</a></li> <li id="document-action-copy_of_full_screen"> <a href="http://www.gnu.org/rss/whatsnew.rss" title="">GNU</a> </li> <li id="document-action-print"> <a href="" title=""></a> </li> </ul> </div></div> </div> </article> </div> <div id="viewlet-below-content"> </div> </div> </div></div></div> <div id="fsf-sidebar" class="yui-b visualNoPrint"> <aside> <span style="display: none;">1PC9aZC4hNX2rmmrt7uHTfYAS3hRbph4UN</span> <div id="search"> <form id="sidesearch" name="searchform" action="/search"> <p><input name="SearchableText" tabindex="1" type="text" size="30" title="Search Site" /></p> <p><input class="searchButton" type="submit" value="Search" /></p> </form> </div> <div class="visualPadding"> <div class="portletWrapper" data-portlethash="706c6f6e652e7269676874636f6c756d6e0a636f6e746578740a2f6673662f63616d706169676e730a74616b652d616374696f6e" id="portletwrapper-706c6f6e652e7269676874636f6c756d6e0a636f6e746578740a2f6673662f63616d706169676e730a74616b652d616374696f6e"> <dl class="portlet portletStaticText portlet-static-participate-in-librelocal-month"> <dt class="portletHeader"> <span class="portletTopLeft"></span> <span> Participate in #LibreLocal month! 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Will your computer's "Secure Boot" turn out to be "Restricted Boot"? — Free Software Foundation — Working together for free software