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    <p>I ran into this problem today, and found your question looking for the answer. I've seen many merry an example of how to <em>encrypt</em> things for multiple recipients... never saying/showing what will happen when one tries to <em>decrypt</em> that data. Here's what I got:</p> <pre><code>user@system ~ $ gpg --decrypt filename.pgp You need a passphrase to unlock the secret key for user: "SOMEBODY ELSE &lt;somebody_else@example.com&gt;" 2048-bit ELG-E key, ID ABC1234, created 1972-10-29 (main key ID ABC5678) gpg: Invalid passphrase; please try again ... [I DON'T HAVE *THEIR* PASSPHRASE!] 2 more times... finally... You need a passphrase to unlock the secret key for user: "HEY! This is ME! &lt;my_email@example.com&gt;" 2048-bit ELG-E key, ID DEF1234, created 1969-02-03 (main key ID DEF5678) gpg: encrypted with 2048-bit ELG-E key, ID ABC1234, created 1972-10-29 "NAME &lt;email@example.com&gt;" gpg: public key decryption failed: bad passphrase gpg: encrypted with 2048-bit ELG-E key, ID DEF1234, created 1969-02-03 "HEY! This is ME! &lt;my_email@example.com&gt;" and then the file decrypted fine... </code></pre> <p><em>Quick Note:</em> Just to clarify, <a href="http://www.pgpi.org/doc/pgpintro/" rel="nofollow">for security reasons</a> one's passphrase and one's <a href="http://en.wikipedia.org/wiki/Public-key_cryptography" rel="nofollow">private key</a> should <strong>NEVER</strong> be given to anyone else. <a href="http://www.gnupg.org/gph/en/manual/c481.html" rel="nofollow">The passphrase is to keep the private key "safe" should it become compromised.</a> One's <em>public</em> key is the only thing that should be shared with others.</p> <p>I preface this with the fact I currently only have access to version 1.4.2.2, and don't have the ability to test these solutions. Later version have certain options that may well be what's needed. <strong><em>Please try and answer back if any of these work.</em></strong></p> <p><code>--local-user/-u</code> looked promising. In the version I have, <code>--help</code> showed <a href="http://www.csc.gatech.edu/~copeland/6612/pgp/gpg_quick_help.txt" rel="nofollow"><code>use this user-id to sign or decrypt</code></a> But when trying it seemed futile, further research revealed a cruel truth: <a href="http://www.gossamer-threads.com/lists/gnupg/users/4848#4848" rel="nofollow">seems the help is wrong</a>, and this is ONLY an option using for <a href="http://gnupg.org/gph/en/manual/x135.html" rel="nofollow">"signing"</a>.</p> <p><a href="http://www.gossamer-threads.com/lists/gnupg/users/51238#51238" rel="nofollow">This post</a> has a likely solution, though I personally find it messy:</p> <pre><code>gpg --try-all-secrets --passphrase &lt;passphrase here&gt; filename.pgp </code></pre> <p><code>--passphrase</code> <a href="http://lists.gnupg.org/pipermail/gnupg-users/2007-August/031711.html" rel="nofollow">was apparently added in version 1.4.3</a>. UGH!</p> <p><strong>EDIT:</strong> <a href="http://www.gnupg.org/documentation/manpage.html" rel="nofollow">Perhaps a better (possibly, below) solution is only available in gpg2? </a> <a href="http://www.gnupg.org/documentation/manuals/gnupg-devel/GPG-Key-related-Options.html#GPG-Key-related-Options" rel="nofollow"><code>gpg2 seems to have</code></a> <code>--try-secret-key</code>, which if I read correctly, may be what we're both looking for?</p>
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