but it's a good videos and personally i like them , they cover
you may don't like it because it don't cover it in advanced way and it only cover basic knowledge of each of them but the good thing is , no matter how dumb you are , you will still learn from it
personally i like them , videos are 2-18 mins explained with friendly graphical way
if you got more of videos which is similar to that feel free to share them or pm me the links (about programming / sockets / Cryptography / reverse engineering )
after finishing the tutorials i found that wiki became more fun if u got information about what you reading about
here is the link so incase you got a question or need to go more in depth
there you go
http://en.wikipedia.org/wiki/Cryptography
http://en.wikipedia.org/wiki/Fundame..._of_arithmetic
http://en.wikipedia.org/wiki/Probability
http://en.wikipedia.org/wiki/Public-key_cryptography
http://en.wikipedia.org/wiki/Enigma_machine
http://en.wikipedia.org/wiki/One-time_pad
http://en.wikipedia.org/wiki/Diffie%...n_key_exchange
or