Diffie and Hellman's 1976 paper, "New Directions in Cryptography"[1], cited by their Turing Award, seems like a good start. [1] https://www-ee.stanford.edu/~he

Diffie and Hellman's 1976 paper, "New Directions in Cryptography"[1], cited by their Turing Award, seems like a good start. [1] https://www-ee.stanford.edu/~hellman/publications/24.pdf https://www-ee.stanford.edu/~hellman/publications/24.pdf