Big +1 to Cryptography I. I didn't finish it completely, but the first ~half satisfied my curiosity about the theory I wanted to know, without getting to a lot

Big +1 to Cryptography I. I didn't finish it completely, but the first ~half satisfied my curiosity about the theory I wanted to know, without getting to a lot of the practical details that I don't need to remember day-to-day. Dan and Victor also wrote a course book: http://toc.cryptobook.us/ http://toc.cryptobook.us/