• A Method for Obtaining Digital Signatures and Public-Key Cryptosystems
• Twenty Years of Attacks on the RSA Cryptosystem
• Communication Theory of Secrecy Systems
• New Directions in Cryptography

The original classified memo for Bell Labs that was republished in 1949 as "Communication Theory of Secrecy Systems".

Shannon said that his wartime insights into communication theory and cryptography developed simultaneously and that "they were so close together you couldn’t separate them". "Communication Theory of Secrecy Systems" incorporates many concepts and formulations that also appeared in his 1948 paper.