History of cryptography

Develop a presentation of 10–12 slides on the history of cryptography, and provide examples of a substitution cipher, a transposition cipher, and steganography. Explain how each cipher works, the function of a one-time pad, and how frequency analysis is used as part of cryptanalysis. Include appropriate speaker notes on each slide. In addition to the 10–12 slides, include a cover slide and a reference slide.