The course will introduce the main security issues in multimedia applications. In particular, they will be discussed the issues related to modern cryptography (from the Caesar’s cipher to the Enigma machine), steganography, watermarking and fingerprinting. Particular attention will be given to contemporary encryption techniques (Cipher One-Time Pad (OTP), stream ciphers, block ciphers, the confusion and diffusion concepts, the Avalanche’s criterion, the substitution-permutation networks, the Feistel networks, the Data Encryption Standard (DES, 3DES and AES). During the course, specific laboratory exercises related to security of networks and multimedia applications will be given.
- Teacher: Gian Luca Foresti
- Teacher: Andrea Toma