What is famous cryptographers?

1. Alan Turing: A mathematician, logician, and computer scientist, Alan Turing is known as the father of modern computer science and a pioneer in the field of cryptography. During World War II, he developed a machine called the Bombe that was used to decrypt German messages encrypted by the Enigma machine.

2. William Friedman: Known as the father of modern American cryptography, William Friedman was a cryptologist during World War I and II. He was instrumental in breaking the Japanese code, Purple, which helped to end the war in the Pacific.

3. Auguste Kerckhoffs: A Belgian linguist, August Kerckhoffs was a cryptographer during the late 19th century. He is known for his principle, which states that a cryptosystem should be secure even if the enemy knows everything about it except for the secret key.

4. Claude Shannon: A mathematician and electrical engineer, Claude Shannon is known as the father of modern information theory. He made significant contributions to cryptography, including the concept of perfect secrecy and the invention of the one-time pad.

5. Marian Rejewski: A Polish mathematician and cryptologist, Marian Rejewski was one of the first people to break the Enigma code used by the Germans during World War II. He worked with a team of mathematicians and used a method called the "Bomby" to decrypt the code.

6. Mary K. Hawes: An American cryptographer and cryptanalyst, Mary K. Hawes worked for the U.S. Navy during World War II. She helped to break the Japanese code, JN-25, which was used to communicate the attack on Pearl Harbor.

7. James Ellis: A British cryptographer and computer scientist, James Ellis developed the concept of public key cryptography in 1970. This concept is the foundation for many modern cryptographic systems, including RSA.

8. Adi Shamir: An Israeli cryptographer, Adi Shamir is known for his research on the security of cryptographic systems. He is one of the co-inventors of the RSA algorithm, which is widely used for secure data transmission.

9. Whitfield Diffie and Martin Hellman: American cryptographers, Whitfield Diffie and Martin Hellman are known for their discovery of public key cryptography in 1976. Their work laid the foundation for all modern cryptography systems used today.

10. Bruce Schneier: An American cryptographer and security expert, Bruce Schneier is a prolific author and speaker on security and cryptography. He has authored numerous books on security and cryptography, including "Applied Cryptography" and "Secrets and Lies."