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class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav 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class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Zfone</caption><tbody><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Original author(s)</a></th><td class="infobox-data"><a href="/wiki/Phil_Zimmermann" title="Phil Zimmermann">Phil Zimmermann</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data">Encrypted VoIP</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Proprietary_software" title="Proprietary software">Proprietary</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="http://zfoneproject.com">zfoneproject<wbr />.com</a></span></td></tr></tbody></table> <p><b>Zfone</b> is software for <a href="/wiki/Secure_voice" title="Secure voice">secure voice</a> communication over the Internet (<a href="/wiki/Voice_over_Internet_Protocol" class="mw-redirect" title="Voice over Internet Protocol">VoIP</a>), using the <a href="/wiki/ZRTP" title="ZRTP">ZRTP</a> protocol. It is created by <a href="/wiki/Phil_Zimmermann" title="Phil Zimmermann">Phil Zimmermann</a>, the creator of the <a href="/wiki/Pretty_Good_Privacy" title="Pretty Good Privacy">PGP</a> encryption software. Zfone works on top of existing <a href="/wiki/Session_Initiation_Protocol" title="Session Initiation Protocol">SIP</a>- and <a href="/wiki/Real-time_Transport_Protocol" title="Real-time Transport Protocol">RTP</a>-programs, but should work with any SIP- and RTP-compliant VoIP-program. </p><p>Zfone turns many existing VoIP clients into secure phones. It runs in the Internet Protocol stack on any Windows XP, Mac OS X, or Linux PC, and intercepts and filters all the VoIP packets as they go in and out of the machine, and secures the call on the fly. A variety of different software VoIP clients can be used to make a VoIP call. The Zfone software detects when the call starts, and initiates a cryptographic key agreement between the two parties, and then proceeds to encrypt and decrypt the voice packets on the fly. It has its own separate <a href="/wiki/Graphical_user_interface" title="Graphical user interface">GUI</a>, telling the user if the call is secure. Zfone describes itself to end-users as a "bump on the wire" between the VoIP client and the Internet, which acts upon the protocol stack. </p><p>Zfone's libZRTP SDK libraries are released under either the <a href="/wiki/Affero_General_Public_License" class="mw-redirect" title="Affero General Public License">Affero General Public License</a> (AGPL) or a commercial license. Note that only the libZRTP SDK libraries are provided under the AGPL. The parts of Zfone that are not part of the libZRTP SDK libraries are not licensed under the AGPL or any other open source license. Although the source code of those components is published for peer review, they remain proprietary. The Zfone proprietary license also contains a <a href="/wiki/Time_bomb_(software)" title="Time bomb (software)">time bomb</a> provision. </p><p>It appears that Zfone development has stagnated, however, as the most recent version was released on 22 Mar 2009.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> In addition, since 29 Jan 2011, it has not been possible to download Zfone from the developer's website since the download server has gone offline.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Platforms_and_specification">Platforms and specification</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Zfone&action=edit&section=1" title="Edit section: Platforms and specification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><b>Availability</b> – <a href="/wiki/Mac_OS_X" class="mw-redirect" title="Mac OS X">Mac OS X</a>, <a href="/wiki/Linux" title="Linux">Linux</a>, and <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Windows</a> as compiled programs as well as an <a href="/wiki/Software_development_kit" title="Software development kit">SDK</a>.</li> <li><b>Encryption standards</b> – Based on <a href="/wiki/ZRTP" title="ZRTP">ZRTP</a>, which uses 128- or 256-bit <a href="/wiki/Advanced_Encryption_Standard" title="Advanced Encryption Standard">AES</a> together with a 3072-bit <a href="/wiki/Key_exchange" title="Key exchange">key exchange</a> system and voice-based verification to prevent <a href="/wiki/Man-in-the-middle_attack" title="Man-in-the-middle attack">man-in-the-middle attacks</a>.</li> <li><b><a href="/wiki/ZRTP" title="ZRTP">ZRTP</a> protocol</b> – Published as an <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">IETF</a> <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon 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.citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/RFC_(identifier)" class="mw-redirect" title="RFC (identifier)">RFC</a> <a rel="nofollow" class="external text" href="https://datatracker.ietf.org/doc/html/rfc6189">6189</a>: "ZRTP: Media Path Key Agreement for Unicast Secure RTP"<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li> <li><b><a href="/wiki/Voice_over_IP" title="Voice over IP">VoIP</a> clients</b> – Zfone has been tested with the following VoIP clients: X-Lite, <a href="/wiki/Gizmo5" title="Gizmo5">Gizmo5</a>, XMeeting, <a href="/wiki/Google_Talk" title="Google Talk">Google Talk</a> VoIP client, and SJphone.</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Zfone&action=edit&section=2" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Comparison_of_VoIP_software" title="Comparison of VoIP software">Comparison of VoIP software</a></li> <li><a href="/wiki/Secure_telephone" title="Secure telephone">Secure telephone</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Zfone&action=edit&section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://zfoneproject.com/faq.html#opensource">"The Zfone Project - FAQ"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+Zfone+Project+-+FAQ&rft_id=http%3A%2F%2Fzfoneproject.com%2Ffaq.html%23opensource&rfr_id=info%3Asid%2Fen.wikipedia.org%3AZfone" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://zfoneproject.com/getstarted.html">"Zfone, Getting Started With"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">June 27,</span> 2011</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Zfone%2C+Getting+Started+With&rft_id=http%3A%2F%2Fzfoneproject.com%2Fgetstarted.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AZfone" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://zfoneproject.com/server_problems.html">"Zfone Project, Server Problems"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">June 27,</span> 2011</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Zfone+Project%2C+Server+Problems&rft_id=http%3A%2F%2Fzfoneproject.com%2Fserver_problems.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AZfone" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://tools.ietf.org/html/rfc6189">RFC 6189</a>.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Zfone&action=edit&section=4" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://zfoneproject.com">Zfone home page</a></li> <li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="http://www.philzimmermann.com">Phil Zimmermann official website</a></span></span></li> <li><a rel="nofollow" class="external text" href="http://news.cnet.com/E-mail+security+hero+takes+on+VoIP/2100-7352_3-6105589.html?tag=nefd.top">CNET News: E-mail security hero takes on VoIP</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20060409190954/http://wired.com/news/technology/0,70524-0.html?">'Wired.com' article April 03 2006</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline 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Mail</a></li> <li><a href="/wiki/Autocrypt" title="Autocrypt">Autocrypt</a></li> <li><a href="/wiki/Claws_Mail" title="Claws Mail">Claws Mail</a></li> <li><a href="/wiki/Enigmail" title="Enigmail">Enigmail</a></li> <li><a href="/wiki/GNU_Privacy_Guard" title="GNU Privacy Guard">GPG</a> (<a href="/wiki/Gpg4win" title="Gpg4win">Gpg4win</a>)</li> <li><a href="/wiki/Kontact" title="Kontact">Kontact</a></li> <li><a href="/wiki/Microsoft_Outlook" title="Microsoft Outlook">Outlook</a></li> <li><a href="/wiki/Pretty_Easy_privacy" title="Pretty Easy privacy">p≡p</a></li> <li><a href="/wiki/Pretty_Good_Privacy" title="Pretty Good Privacy">PGP</a></li> <li><a href="/wiki/Sylpheed" title="Sylpheed">Sylpheed</a></li> <li><a href="/wiki/Mozilla_Thunderbird" title="Mozilla Thunderbird">Thunderbird</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Secure_communication" title="Secure communication">Secure<br />communication</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Off-the-Record_Messaging" class="mw-redirect" title="Off-the-Record Messaging">OTR</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Adium" title="Adium">Adium</a></li> <li><a href="/wiki/BitlBee" title="BitlBee">BitlBee</a></li> <li><a href="/wiki/Centericq" title="Centericq">Centericq</a></li> <li><a href="/wiki/ChatSecure" title="ChatSecure">ChatSecure</a></li> <li><a href="/wiki/Climm" title="Climm">climm</a></li> <li><a href="/wiki/Jitsi" title="Jitsi">Jitsi</a></li> <li><a href="/wiki/Kopete" title="Kopete">Kopete</a></li> <li><a href="/wiki/Profanity_(instant_messaging_client)" title="Profanity (instant messaging client)">Profanity</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Secure_Shell" title="Secure Shell">SSH</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dropbear_(software)" title="Dropbear (software)">Dropbear</a></li> <li><a href="/wiki/Lsh" title="Lsh">lsh</a></li> <li><a href="/wiki/OpenSSH" title="OpenSSH">OpenSSH</a></li> <li><a href="/wiki/PuTTY" title="PuTTY">PuTTY</a></li> <li><a href="/wiki/SecureCRT" title="SecureCRT">SecureCRT</a></li> <li><a href="/wiki/WinSCP" title="WinSCP">WinSCP</a></li> <li><a href="/wiki/WolfSSH" title="WolfSSH">wolfSSH</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Transport_Layer_Security" title="Transport Layer Security">TLS & SSL</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BBM_Enterprise" title="BBM Enterprise">BBM Enterprise</a></li> <li><a href="/wiki/Bouncy_Castle_(cryptography)" title="Bouncy Castle (cryptography)">Bouncy Castle</a></li> <li><a href="/wiki/OpenSSL#BoringSSL" title="OpenSSL">BoringSSL</a></li> <li><a href="/wiki/Botan_(programming_library)" title="Botan (programming library)">Botan</a></li> <li><a href="/wiki/Cryptlib" title="Cryptlib">cryptlib</a></li> <li><a href="/wiki/GnuTLS" title="GnuTLS">GnuTLS</a></li> <li><a href="/wiki/Java_Secure_Socket_Extension" title="Java Secure Socket Extension">JSSE</a></li> <li><a href="/wiki/LibreSSL" title="LibreSSL">LibreSSL</a></li> <li><a href="/wiki/MatrixSSL" title="MatrixSSL">MatrixSSL</a></li> <li><a href="/wiki/Network_Security_Services" title="Network Security Services">NSS</a></li> <li><a href="/wiki/OpenSSL" title="OpenSSL">OpenSSL</a></li> <li><a href="/wiki/Mbed_TLS" title="Mbed TLS">mbed TLS</a></li> <li><a href="/wiki/BSAFE" title="BSAFE">BSAFE</a></li> <li><a href="/wiki/Security_Support_Provider_Interface" title="Security Support Provider Interface">SChannel</a></li> <li><a href="/wiki/SSLeay" title="SSLeay">SSLeay</a></li> <li><a href="/wiki/Stunnel" title="Stunnel">stunnel</a></li> <li><a href="/wiki/TeamNote" title="TeamNote">TeamNote</a></li> <li><a href="/wiki/WolfSSL" title="WolfSSL">wolfSSL</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Virtual_private_network" title="Virtual private network">VPN</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Check_Point_VPN-1" class="mw-redirect" title="Check Point VPN-1">Check Point VPN-1</a></li> <li><a href="/wiki/LogMeIn_Hamachi" title="LogMeIn Hamachi">Hamachi</a></li> <li><a href="/wiki/Openswan" title="Openswan">Openswan</a></li> <li><a href="/wiki/OpenVPN" title="OpenVPN">OpenVPN</a></li> <li><a href="/wiki/SoftEther_VPN" title="SoftEther VPN">SoftEther VPN</a></li> <li><a href="/wiki/StrongSwan" title="StrongSwan">strongSwan</a></li> <li><a href="/wiki/Tinc_(protocol)" title="Tinc (protocol)">Tinc</a></li> <li><a href="/wiki/WireGuard" title="WireGuard">WireGuard</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/ZRTP" title="ZRTP">ZRTP</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Jitsi" title="Jitsi">Jitsi</a></li> <li><a href="/wiki/Linphone" title="Linphone">Linphone</a></li> <li><a href="/wiki/Jami_(software)" title="Jami (software)">Jami</a></li> <li><a class="mw-selflink selflink">Zfone</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Peer-to-peer" title="Peer-to-peer">P2P</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bitmessage" title="Bitmessage">Bitmessage</a></li> <li><a href="/wiki/Briar_(software)" title="Briar (software)">Briar</a></li> <li><a href="/wiki/RetroShare" class="mw-redirect" title="RetroShare">RetroShare</a></li> <li><a href="/wiki/Tox_(protocol)" title="Tox (protocol)">Tox</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Double_Ratchet_Algorithm" title="Double Ratchet Algorithm">DRA</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Matrix_(protocol)" title="Matrix (protocol)">Matrix</a></li> <li><a href="/wiki/OMEMO" title="OMEMO">OMEMO</a> <ul><li><a href="/wiki/Cryptocat" title="Cryptocat">Cryptocat</a></li> <li><a href="/wiki/ChatSecure" title="ChatSecure">ChatSecure</a></li></ul></li> <li><a href="/wiki/Wire_Swiss" title="Wire Swiss">Proteus</a></li> <li><a href="/wiki/Session_(software)" title="Session (software)">Session</a></li> <li><a href="/wiki/Signal_Protocol" title="Signal Protocol">Signal Protocol</a> <ul><li><a href="/wiki/Facebook_Messenger" class="mw-redirect" title="Facebook Messenger">Facebook Messenger</a></li> <li><a href="/wiki/Google_Allo" title="Google Allo">Google Allo</a></li> <li><a href="/wiki/Google_Messages" title="Google Messages">Google Messages</a></li> <li><a href="/wiki/Signal_(messaging_app)" class="mw-redirect" title="Signal (messaging app)">Signal</a></li> <li><a href="/wiki/TextSecure" title="TextSecure">TextSecure</a></li> <li><a href="/wiki/WhatsApp" title="WhatsApp">WhatsApp</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Disk_encryption" title="Disk encryption">Disk encryption</a><br /><span style="font-weight:normal">(<a href="/wiki/Comparison_of_disk_encryption_software" title="Comparison of disk encryption software">Comparison</a>)</span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BestCrypt" title="BestCrypt">BestCrypt</a></li> <li><a href="/wiki/BitLocker" title="BitLocker">BitLocker</a></li> <li><a href="/wiki/CrossCrypt" title="CrossCrypt">CrossCrypt</a></li> <li><a href="/wiki/Cryptoloop" title="Cryptoloop">Cryptoloop</a></li> <li><a href="/wiki/Dm-crypt" title="Dm-crypt">dm-crypt</a></li> <li><a href="/wiki/DriveSentry" title="DriveSentry">DriveSentry</a></li> <li><a href="/wiki/E4M" title="E4M">E4M</a></li> <li><a href="/wiki/ECryptfs" title="ECryptfs">eCryptfs</a></li> <li><a href="/wiki/FileVault" title="FileVault">FileVault</a></li> <li><a href="/wiki/FreeOTFE" title="FreeOTFE">FreeOTFE</a></li> <li><a href="/wiki/GBDE" title="GBDE">GBDE</a></li> <li><a href="/wiki/Geli_(software)" title="Geli (software)">geli</a></li> <li><a href="/wiki/Linux_Unified_Key_Setup" title="Linux Unified Key Setup">LUKS</a></li> <li><a href="/wiki/PGPDisk" title="PGPDisk">PGPDisk</a></li> <li><a href="/wiki/Private_Disk" title="Private Disk">Private Disk</a></li> <li><a href="/wiki/Scramdisk" title="Scramdisk">Scramdisk</a></li> <li><a href="/wiki/Sentry_2020" title="Sentry 2020">Sentry 2020</a></li> <li><a href="/wiki/TrueCrypt" title="TrueCrypt">TrueCrypt</a> <ul><li><a href="/wiki/TrueCrypt_version_history" title="TrueCrypt version history">History</a></li></ul></li> <li><a href="/wiki/VeraCrypt" title="VeraCrypt">VeraCrypt</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anonymity#Anonymity_on_the_Internet" title="Anonymity">Anonymity</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GNUnet#File_sharing" title="GNUnet">GNUnet</a></li> <li><a href="/wiki/I2P" title="I2P">I2P</a></li> <li><a href="/wiki/Java_Anon_Proxy" title="Java Anon Proxy">Java Anon Proxy</a></li> <li><a href="/wiki/Tor_(network)" title="Tor (network)">Tor</a></li> <li><a href="/wiki/Vidalia_(software)" title="Vidalia (software)">Vidalia</a></li> <li><a href="/wiki/RetroShare" class="mw-redirect" title="RetroShare">RetroShare</a></li> <li><a href="/wiki/Ricochet_(software)" title="Ricochet (software)">Ricochet</a></li> <li><a href="/wiki/Wickr" title="Wickr">Wickr</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/File_system" title="File system">File systems</a> <span style="font-weight:normal">(<a href="/wiki/List_of_cryptographic_file_systems" title="List of cryptographic file systems">List</a>)</span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/EncFS" title="EncFS">EncFS</a></li> <li><a href="/wiki/Encrypting_File_System" title="Encrypting File System">EFS</a></li> <li><a href="/wiki/ECryptfs" title="ECryptfs">eCryptfs</a></li> <li><a href="/wiki/Linux_Unified_Key_Setup" title="Linux Unified Key Setup">LUKS</a></li> <li><a href="/w/index.php?title=PEFS&action=edit&redlink=1" class="new" title="PEFS (page does not exist)">PEFS</a></li> <li><a href="/wiki/Rubberhose_(file_system)" class="mw-redirect" title="Rubberhose (file system)">Rubberhose</a></li> <li><a href="/wiki/StegFS" title="StegFS">StegFS</a></li> <li><a href="/wiki/Tahoe-LAFS" title="Tahoe-LAFS">Tahoe-LAFS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Security-focused_operating_system" title="Security-focused operating system">Security-focused<br />operating system</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Tails_(operating_system)" title="Tails (operating system)">Tails</a></li> <li><a href="/wiki/Qubes" class="mw-redirect" title="Qubes">Qubes</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Service providers</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Freenet" class="mw-redirect" title="Freenet">Freenet</a></li> <li><a href="/wiki/Tresorit" title="Tresorit">Tresorit</a></li> <li><a href="/wiki/Wuala" title="Wuala">Wuala</a></li> <li><a href="/wiki/NordLocker" title="NordLocker">NordLocker</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Educational</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CrypTool" title="CrypTool">CrypTool</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anti%E2%80%93computer_forensics" title="Anti–computer forensics">Anti–computer forensics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/USBKill" title="USBKill">USBKill</a></li> <li><a href="/wiki/BusKill" title="BusKill">BusKill</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Outline_of_cryptography" title="Outline of cryptography">Outline of cryptography</a></li> <li><a href="/wiki/Timeline_of_cryptography" title="Timeline of cryptography">Timeline of cryptography</a></li> <li><a href="/wiki/Hash_function" title="Hash function">Hash functions</a> <ul><li><a href="/wiki/Cryptographic_hash_function" title="Cryptographic hash function">Cryptographic hash function</a></li> <li><a href="/wiki/List_of_hash_functions" title="List of hash functions">List of hash functions</a></li></ul></li> <li><a href="/wiki/Homomorphic_encryption" title="Homomorphic encryption">Homomorphic encryption</a></li> <li><a href="/wiki/End-to-end_encryption" title="End-to-end encryption">End-to-end encryption</a></li> <li><a href="/wiki/S/MIME" title="S/MIME">S/MIME</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" 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