Caesar Cipher, Playfair Cipher, going off the grid and more. Download or subscribe to this show at twit.tv/sn. We invite you to read, add to, and amend our show notes. For 16Kbps versions, transcripts, and notes (including fixes), visit Steve's site: grc.com, also the home of the best disk maintenance and recovery utility ever written - Spinrite 6. Audio bandwidth is provided by Winamp, subscribe to TWiT and all your favorite podcasts with the ultimate media player, download it for free at Winamp.com.