Real-World Cryptography

16 When and where cryptography fails

This chapter covers

• General issues you can run into when using cryptography
• The mantras to follow to bake good cryptography
• The dangers and responsibilities of a cryptography practitioner

Greetings, traveler; you’ve come a long way. While this is the last chapter, it’s all about the journey, not the end. You’re now equipped with the gear and skills required to step into the real world of cryptography. What’s left is for you to apply what you’ve learned.

Before parting ways, I’d like to give you a few hints and tools that’ll be useful for what follows. The quests you’ll face often follow the same pattern: it starts with a challenge, launching you on a pursuit for an existing cryptographic primitive or protocol. ...