Substitution Ciphers

Substitution Ciphers are explored as a fundamental concept in encryption. These ciphers involve replacing each letter in the plaintext with another letter according to a predetermined rule or key. The lecture delves into various types of substitution ciphers, such as the Caesar cipher and the Atbash cipher, discussing their mechanisms and historical significance. By understanding Substitution Ciphers, students gain insight into the basic principles of encryption and how early civilizations safeguarded sensitive information. This knowledge serves as a building block for exploring more advanced encryption techniques in subsequent lectures.