Differences between version 58 and predecessor to the previous major change of GPG/PGPNotes.
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| Newer page: | version 58 | Last edited on Friday, February 4, 2005 1:46:19 am | by StuartYeates | Revert |
| Older page: | version 55 | Last edited on Tuesday, October 26, 2004 11:24:17 am | by AristotlePagaltzis | Revert |
@@ -228,6 +228,21 @@
!!!Recover a public key from the corresponding secret key
gpg --export-secret-key 0x12345678 | gpgsplit --no-split --secret-to-public | gpg --import
+----
+!!!Extend the lifetime of, or "unexpire", a key
+
+Generating keys with expiry dates is good because it allows the keys to be flushed from keyservers and keyrings aftre a fixed length of time and limits the period revocation certificates have to be circulated. However, often it is advisable to extend the life of a key which is embedded in the web of trust. This can be done using the command:
+
+ gpg --edit 0x12345678
+
+and then the "expire" option. Some signatures have expiry dates within them which co-incide with the expiry date of the key. There is no way to extend these, except to get the signer to sign the updated key.
+
+----
+!!!Ensuring compatibility with old versions of [PGP]/[GnuPG]:
+
+There is a comprehensive table of what algorithms are supported by every version:
+
+https://netfiles.uiuc.edu/ehowes/www/pgp-summ.htm
----
Part of CategoryCryptography
