Cryptography Fundamentals

This lecture introduces the fundamentals of cryptography, covering the scope of cryptography, adversarial thinking, security modeling, public key cryptography, symmetric cryptography, and security parameters selection. The instructor discusses the evolution of cryptography, the challenges of key exchange, and the importance of authentication. Various cryptographic tools and protocols such as TLS, PGP, and SSH are explained, along with the concepts of confidentiality, authentication, and integrity in secure communication. The lecture also touches on the history of cryptography, from ancient secret codes to modern encryption methods.