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about-diff-private-public.page
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about-pgp.page
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about-ssh.page
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concepts.page
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introduction.page
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keyring-create.page
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keyring.page
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keyring-update-password.page
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key-servers-add.page
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legal.xml
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misc-key-backup.page
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misc-key-fingerprint.page
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passwords-stored-create.page
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passwords-view.page
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pgp-create.page
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pgp-delete.page
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pgp-expiration-change.page
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pgp-expired.page
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pgp-export.page
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pgp-import.page
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pgp-photoid.page
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pgp-publish.page
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pgp-retrieve-remote.page
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pgp-sign.page
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pgp-subkeys.page
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pgp-sync.page
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pgp-userid-add.page
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pgp-userid.page
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pgp-userid-primary.page
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ssh-export.page
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ssh-import.page
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subkeys-add.page
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subkeys-revoke.page
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Code Editor : pgp-subkeys.page
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" type="guide" style="task" id="pgp-subkeys"> <info> <link type="guide" xref="index#pgp-keys" group="second"/> <revision version="0.1" date="2011-10-23" status="stub"/> <revision pkgversion="3.9" version="0.1" date="2013-06-28" 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>A subkey is always bound to a master key in a PGP keypair. It is used for encryption.</desc> </info> <title>What is a subkey?</title> <p>Though it is very important to keep your keys safe, it can become quite tedious to do so when you have many keys. <app>Passwords and Keys</app> provides a simple solution to key safety by using <em>subkeys</em> for signing and encryption.</p> <p>Whenever you <link xref="pgp-create">create</link> a new public encryption key, a <em>keypair</em> is generated instead of a single key. This keypair consists of a main key, also called the <em>master key</em> and a <em>subkey</em>. A master key can be used to create additional subkeys that are then bound to it.</p> <list> <title>What does each key in a keypair do?</title> <item> <p>The <em>master key</em> is used for <link xref="pgp-sign">signing</link> other keys, creating subkeys and <link xref="subkeys-revoke">revoking</link> subkeys. Your master key must be kept very safe. Signatures of trust are also collected on your master key. If the master key is compromised, you have no choice but to revoke it and all the subkeys attached to it.</p> </item> <item> <p>The default <em>subkey</em> is used for encryption and decryption of messages. Additional subkeys can be created for signing. Though it is important that your subkeys are kept safe, you can always revoke a subkey if it is compromised and create a new one with the original master key.</p> </item> </list> <section id="more" style="2column"> <title>More about subkeys</title> </section> </page>
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