Re: Book recommendations about cryptography?

You can try checking out some of the stuff on Coursera. I just started this one tonight so can't vouch for it in any way.

https://www.coursera.org/learn/classical-cryptosystems/home/welcome

There are a few others there too on Cryptography.

Ment to come back to this to add a link showing how to get the Corsera courses for free by using the 'audit' option.

https://www.class-central.com/report/coursera-signup-for-free/