William Friedman

William Friedman was an influential American cryptanalyst and expert in code-breaking, best known for his work during World War II and the Cold War. He played a key role in developing techniques to decipher encrypted messages, improving national security. Friedman also advanced the science of cryptography, contributing to the understanding of how to create and analyze secure communication systems. His work helped shape modern methods of protecting sensitive information, and he is considered one of the foundational figures in the field of information security.