Dr. Olaf Manz first worked as a research assistant and Heisenberg professor at the mathematical institutes of the universities of Mainz and Heidelberg. He then worked for many years at Siemens in IT product management and knows cryptography from the practical side. He is also the author of the book "Error-Correcting Codes", also published by Springer.

Basics and history.- Symmetric ciphers.- Public-key ciphers.- Digital signature.