I finished reading Crypto: How the Code Rebels Beat the Government Saving Privacy in the Digital Age on my plane ride out to San Francisco.
It was a good read. I thought it was going to be much drier than it ended up being. I was thinking it was going to be straight history, but it was much more of a story. The author did a good job of interviewing people and getting the real back story and inside information rather than just what happened in public.
The story basically covers cryptography in the public sector from Diffie and Hellman up to recent things like a lot of the fighting that went on once the Internet gained popularity. Definitely very interesting read with a lot of good information. If you have any interest in cryptography or even just wonder all about how stuff gets encrypted when you guys stuff on the Net, you may find this to be an interesting read.