Current File : //usr/share/help/C/seahorse/pgp-sign.page
<page xmlns="http://projectmallard.org/1.0/"
xmlns:its="http://www.w3.org/2005/11/its"
type="guide" style="task"
id="pgp-sign">
<info>
<link type="guide" xref="index#pgp-keys"/>
<revision pkgversion="3.9" date="2013-08-29" status="review"/>
<include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
<credit type="author copyright">
<name>Aruna Sankaranarayanan</name>
<email its:translate="no">aruna.evam@gmail.com</email>
<years>2013</years>
</credit>
<desc>If you trust a key, you can sign it.</desc>
</info>
<title>Sign keys</title>
<p>To show that you trust and vouch for the genuineness of someone's key, you
can sign it. A person's key must be signed only after you compare the
<link xref="pgp-userid">user ID</link> on the key with a valid proof of their
identity, such as a passport, driver's license, or similar. If the two IDs
match, the key is said to be trustworthy.</p>
<steps>
<title>To sign a key:</title>
<item>
<p>Import the <link xref="pgp-retrieve-remote">remote key</link> or
<link xref="pgp-import">keyfile</link> containing the key to be signed
into <app>Passwords and Keys</app>.</p>
</item>
<item>
<p>From the list of <gui>GnuPG keys</gui> select the imported key.</p>
</item>
<item>
<p>Right click the key and select
<guiseq><gui>Properties</gui><gui>Trust</gui></guiseq>.</p>
</item>
<item>
<p>Press the <gui style="button">Sign this Key</gui> button.</p>
</item>
<item>
<p>Depending on how carefully you have checked the key, choose one out of
<gui style="radiobutton">Not at all</gui>,
<gui style="radiobutton">Casually</gui> or
<gui style="radiobutton">Very carefully</gui>.</p>
</item>
<item>
<p>Decide if you want to revoke your signature at a later date and if you
want to make your signature public, by ticking the checkboxes
provided.</p>
</item>
<item>
<p>When you own more than one PGP key, select the key you want to sign
with, from the list next to <gui>Signer</gui>.</p>
</item>
<item>
<p>Press the <gui style="button">Sign</gui> button to finish.</p>
</item>
</steps>
<note style="info">
<title>Can I sign my own keys?</title>
<p>When you <link xref="pgp-create">create</link> a new
<gui>GnuPG key</gui>, it is automatically signed by you. Any new subkeys
<link xref="subkeys-add">created</link> using a <gui>GnuPG key</gui>, will
also be signed automatically.</p>
</note>
</page>
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