Cryptography, Cryptology, and Cryptanalysis

This is an introduction to cryptography for programmers; it doesn't aim to teach the theory, but rather to guide you in your attempt to understand how to use cryptography to secure your services. We'll talk about where it fits into the big picture, and illustrate it using The Go Programming Language. Some of the things we'll discuss are symmetric, asymmetric, and hybrid cryptography, message authentication codes, trust, and how to engineer these systems properly to mitigate risk.

This book describes several encryption Python programs for various ciphers, along with how to write Python programs that can break these ciphers.

Hacking Secret Ciphers with Python not only teaches you how to write in secret ciphers with paper and pencil. This book teaches you how to write your own cipher programs and also the hacking programs that can break the encrypted messages from these ciphers. Unfortunately, the programs in this book won't get the reader in trouble with the law (or rather, fortunately) but it is a guide on the basics of both cryptography and the Python programming language.