I just accidentally stumbled on a site, http://www.bletchleypark.org.uk/. This is a site which contains math resources on cryptography, something of my interest. It provides free downloadable resources on substitution ciphers up to enigma cipher. At the time of writing this post, I was downloading all the resources available on this particular address:
http://www.bletchleypark.org.uk/edu/resources.rhtm
For anyone who finds it interesting to spend some amount of time learning this stuff, this website should be worth-visiting. Enjoy, then! 🙂
/* Posted by Paulinus Pandiangan */
The Notes 