It's all in Jon's headline, really: the book teaches Python, not modern cryptography. I've had fun playing with simple codes and code-breaking from books and magazines when I was younger; I hope the ...

A stream cipher is an encryption method in which data is encrypted one byte at a time. In this method, a cryptographic key and algorithm are applied to each binary digit in a plaintext data stream to ...

This guide on the basics of both cryptography and the Python programming language not only teaches you how to write in secret ciphers with paper and pencil but also how to write your own cipher ...