Asymmetric Cryptography and Password-based Authentication

This lecture covers the fundamentals of asymmetric cryptography, including encryption and digital signatures. It explains the use of public and secret keys, as well as the importance of key infrastructure. The concept of hybrid encryption, combining symmetric and asymmetric encryption, is also discussed. Additionally, the Diffie-Hellman key exchange protocol is presented as a method for secure communication. The lecture delves into the challenges of authentication, different ways to prove identity, and the importance of secure storage and checking of passwords. It concludes with a discussion on secure transfer methods and protection against replay attacks.