## translation metadata
# Revision: $Revision$
# Translation-Priority: 2-medium
#include "head.wmi" TITLE="Tor Project: Verifying Signatures" CHARSET="UTF-8"
<div id="content" class="clearfix">
<div id="breadcrumbs">
<a href="<page index>">Home » </a>
<a href="<page docs/verifying-signatures>">Verifying Signatures</a>
</div>
<div id="maincol">
<h1>How to verify signatures for packages</h1>
<hr>
<p>Each file on <a href="<page download/download>">our download page</a> is accompanied
by a file with the same name as the package and the extension
".asc". These .asc files are GPG signatures. They allow you to verify
the file you've downloaded is exactly the one that we intended you to
get. For example, tor-browser-<version-torbrowserbundle>_en-US.exe is accompanied by
tor-browser-<version-torbrowserbundle>_en-US.exe.asc.</p>
<p>Of course, you'll need to have our GPG keys in your keyring: if you don't
know the GPG key, you can't be sure that it was really us who signed it. The
signing keys we use are:</p>
<ul>
<li>Roger's (0x28988BF5) typically signs the source code file.</li>
<li>Nick's (0x165733EA, or its subkey 0x8D29319A).</li>
<li>Andrew's (0x31B0974B) typically signed older packages for windows and mac.</li>
<li>Peter's (0x94C09C7F, or its subkey 0xAFA44BDD).</li>
<li>Matt's (0x5FA14861).</li>
<li>Jacob's (0xE012B42D).</li>
<li>Erinn's (0x63FEE659) and (0xF1F5C9B5) typically signs all windows, mac, and most linux packages.</li>
<li>Mike's (0xDDC6C0AD) signs the Torbutton xpi.</li>
<li>Karsten's (0xF7C11265) signs the metrics archives and tools.</li>
</ul>
<h3>Step Zero: Install GnuPG</h3>
<hr>
<p>You need to have GnuPG installed before you can verify
signatures.</p>
<ul>
<li>Linux: see <a
href="http://www.gnupg.org/download/">http://www.gnupg.org/download/</a>
or install <i>gnupg</i> from the package management system.</li>
<li>Windows: see <a
href="http://www.gnupg.org/download/">http://www.gnupg.org/download/</a>. Look
for the "version compiled for MS-Windows" under "Binaries".</li>
<li>Mac: see <a
href="http://macgpg.sourceforge.net/">http://macgpg.sourceforge.net/</a>.</li>
</ul>