This thoroughly revised and updated edition of the bestselling introduction to modern cryptography breaks down fundamental mathematical concepts without shying away from meaty discussions of how they work. In this practical guide, you’ll gain immeasurable insight into topics like authenticated encryption, secure randomness, hash functions, block ciphers, and public-key techniques such as RSA and elliptic curve cryptography.

You’ll find coverage of topics like:

    The basics of computational security, attacker models, and forward secrecy
    The strengths and limitations of the TLS protocol behind HTTPS secure websites
    Quantum computation and post-quantum cryptography
    How algorithms like AES, ECDSA, Ed25519, Salsa20, and SHA-3 work
    Advanced techniques like multisignatures, threshold signing, and zero-knowledge proofs


Each chapter includes a discussion of common implementation mistakes using real-world examples and details what could go wrong and how to avoid these pitfalls. And, true to form, you’ll get just enough math to show you how the algorithms work so that you can understand what makes a particular solution effective—and how they break.

NEW TO THIS EDITION: This second edition has been thoroughly updated to reflect the latest developments in cryptography. You’ll also find a completely new chapter covering the cryptographic protocols in cryptocurrency and blockchain systems.