Introduction to encryption and historical methods

In Lecture 1, the topic of encryption is introduced, providing an overview of its significance and historical context. The lecture covers various methods employed throughout history to conceal information, emphasizing their role in communication and security. Key concepts such as substitution ciphers, transposition ciphers, and their evolution over time are discussed, laying the foundation for further exploration into modern encryption techniques. Overall, Lecture 1 serves as a primer on encryption, setting the stage for deeper examination into its principles and applications.