A Brief History of Encryption: From Ancient Ciphers to Modern PGP and Beyond
Encryption has evolved over millennia from basic letter shifts and physical tools like the scytale in ancient Egypt, Sparta, and Rome to sophisticated systems protecting modern communications. Early substitution and transposition ciphers gave way to frequency analysis, polyalphabetic methods such as the Vigenère cipher, and mechanical devices including the Enigma machine. The digital era introduced … Read more