Cryptographic Hash Functions and Block Chains

This lecture covers cryptographic hash functions, message authentication codes, and case studies on block chains. It explains the concepts of sponge functions, one round of f, and hash functions like MD5, SHA1, SHA2, and SHA3. The case study on block chains delves into bitcoins, bitcoin transactions, proof-of-work, and the structure of a block chain. Additionally, it discusses MAC, MAC primitives, security aspects, HMAC, examples of hashing, and different MAC variants like CMAC, PMAC, and WC-MAC. The lecture also explores universal hash functions, WC-MAC using stream ciphers, and authenticated modes of operation like CCM and GCM mode.