1. 1. Introduction
2. 2. How to Use This Book
5. 3. Why Rust Meets Cryptography
   1. 3.1. Cryptography is a Systems Problem
   2. 3.2. Safety, Performance, Predictability
   3. 3.3. Cost of Unsafety: Famous Failures
   4. 3.4. First Code: A Naive XOR Encryptor
   5. 3.5. Tooling Up
6. 4. Core Cryptographic Primitives
   1. 4.1. Symmetric Ciphers — XOR, AES, ChaCha20
7. 5. Appendices
   1. 5.1. Glossary of Terms
   2. 5.2. Cryptographic Concepts Cheatsheet