Learn about encryption methods, codes, and basics in this comprehensive video lecture from Prof Bill Buchanan's "Introduction to Security and Network Forensics" book. Explore key-based encryption, cracking techniques, brute force attacks, and the differences between block and stream encryption. Delve into private key encryption, encryption keys, the Diffie-Hellman method, and public key encryption. Gain insights into hashing and PGP encryption. This hour-long session covers essential concepts in cryptography and network security, providing a solid foundation for understanding modern encryption techniques and their applications in forensics.