Organization

Course Overview

This course gives an introduction to secure communication in computer networks. Topics covered in this lecture include:

• history of secure communication
• symmetric cryptography: DES, 3DES, AES
• asymmetric cryptography: RSA, Diffie-Hellman, El Gamal
• hash functions: MD5, SHA1, SHA2, SHA3
• cryptographic protocols: Secret Sharing, Needham-Schroeder, Kerberos, X.509
• other security relevant topics: random number generation, birthday problem

Material/Literature

• The nice and comprehensive Handbook of Applied Cryptography by Menezes, van Oorschot and Vanstone is available online for free and can be found here.
• An extra course about cryptography can be found here.
• A illustrative video about the discrete logarithm problem.
• ECC Visualization (java)
• An example of differential Cryptanalysis can be found here.
• An example of a MD5-collistion with two images can be found here.