Crypto History Chalk Talk Caesar etc rot1: cross the bridge dsptt uif csjenf i made an error, did 'dsntt' :-D rot13 Wizards and Alchemists Kings & Spies WW 1 WW 2 Modern Symmetric v Asymetric (=public key) Code v Cipher Alice Bob Eve rot 13 PGP Practice Like/Unlike: SSL, SSH Keys; Signing Keys; Using Keys keyrings "one ring to rule them all" swiped a deck off the net pgp-how-to.ppt abley.pgp-keysigning-best.pdf