chapter 1 From the Riddles of Ancient Egypt to Cryptography in the Renaissance — 3500 Years in the Making -- chapter 2 From Sixteenth-Century Cryptography to the New Millennium — The Last 500 Years -- chapter 3 Symmetric-Key Cryptography -- chapter 4 Public-Key Cryptography -- chapter 5 Cryptographic Protocols -- chapter 6 Key Management -- chapter 7 Message Authentication -- chapter 8 Electronic Mail and Internet Security -- chapter 9 Applications and the Future -- chapter 10 Noncryptographic Security Issues -- chapter 11 Information Theory and Coding.