OpenPGP-GnuPG Key Signing Party
Many of us sign our free and open source project artifacts with OpenPGP/GnuPG keys. This session proposes an informal key signing party:
"A key signing party is a get-together of people who use the PGP encryption system with the purpose of allowing those people to sign each others keys. Key signing parties serve to extend the web of trust to a great degree."
To participate, create a PGP key pair if you haven't already and send the public key to a keyserver. Then bring small pieces of paper with your name and PGP key fingerprint on them to hand out to people.
After the session, you may fingerprint, validate, and sign the keys of those people you met at the session.