Pearson Network Security Private Communication in a Public World (1st Edition) by Charlie Kaufman

The first edition of Network Security received critical acclaim for its lucid and witty explanations of the inner workings of network security protocols. Honored by Network Magazine as one of the top 10 most useful networking books, it is now fully updated for the latest standards and technologies.
In the second edition, the authors draw on their considerable experience to illuminate all facets of information security, from the basics to advanced cryptography and authentication secure Web and email services and emerging security standards. The authors go far beyond documenting standards and technology: they contrast competing schemes, explain strengths and weaknesses, and identify the crucial errors most likely to compromise secure systems.
The highlights of the book's extensive new coverage include Advanced Encryption Standard (AES), IPsec, SSL, X.509 and related PKI standards, and Web security.