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Some background on what a keysigning party is:
- http://www.cryptnet.net/fdp/crypto/gpg-keysigning_party/en/keysigning_party.html (how to sign using GPG)
- http://www.faqs.org/faqs/pgp-faq/ (general PGP info)
- http://wiki.apache.org/incubator/SigningReleases (how we sign Apache releases)
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