Agenda

Cryptography 
Misconception around cryptography
Symmetric cryptography
Asymmetric cryptography
Hybrid cryptosystem
PGP/OpenPGP History
GnuPG initial setup
GnuPG signing key
GnuPG encrypt/decrypt
GnuPG signature
GnuPG web-of-trust
OpenPGP usage
Bibliography/ref/link
Q&A and key signing ?