I started implementing PGP signed e-mails across the web site. The goal is to have most of our automatically generated e-mail PGP signed with a key reserved for these automated e-mails.

The key we will use:

pub   1024D/163EF538 2007-07-30 [expires: 2008-08-23]
      Key fingerprint = 9958 2ABF 0AEE 06B2 2126  5C88 C9D8 1A62 163E F538
uid                  Internet Storm Center (Automatic Signing Only) <handlers@sans.org>
sub   2048g/FD87BD37 2007-07-30 [expires: 2008-08-23]

This key will be used ONLY for automated e-mails. Please do not use it to send us encrypted e-mail. This key, including a lot of other keys (and old keys) can be found here: https://isc.sans.org/PGPKEYS

Enjoy. And please use our contact form to report bugs. Individual handlers (if they choose to sign e-mail), will still use their individual keys.