Cryptography
Subpages
Symmetrical ciphers
Asymmetrical ciphers
Classical ciphers
Misc
Secret sharing
Linear Feedback Shift Register
PRNG paper:
http://www.lomont.org/Math/Papers/2008/Lomont_PRNG_2008.pdf
Various crypto writeups
Cryptanalysis tutorials
http://theamazingking.com/crypto.php