Information Theoretic Security: Wiretap Channel

This lecture covers the concept of secret key generation in the context of the Wiretap Channel model proposed by Wyner in 1975. It discusses the joint distribution of random variables X, Xa, and Z, and the generation of a secret key. The lecture also explores the notion of secret key capacity and achievable key rate-leakage pairs. Various definitions and theorems related to secret key agreement systems and error probabilities are presented, along with the concept of key leakage rate. The instructor emphasizes the achievable sequences for key rate-leakage pairs and the importance of secrecy constraints in information theoretic security.