Cryptography Basics

This lecture covers the fundamentals of cryptography, including symmetric and public-key systems, confidentiality, integrity, error detection, error correction, hash functions, signatures, and authentication. It explains how encryption works, the importance of keys, encoding vs. encryption, data integrity, error detection schemes, and digital signatures. The instructor also discusses password storage, checksums, and the concept of digital seals. Furthermore, the lecture delves into cryptographic hash functions, password security, ensuring data integrity, and the process of authentication. It concludes with an overview of digital signatures and the significance of non-repudiation in secure communication.