RC5 was designed by which cryptographer?

RC5 was designed by which cryptographer?

• A. Bruce Schneier
• B. Joan Daemen
• C. Whitfield Diffie
• D. Ronald Rivest

Answer: (D)

RC5 was designed by Ronald Rivest. He’s a renowned cryptographer who co-developed the RSA public-key cryptosystem, and RC5 was introduced as part of the RC family of ciphers he developed. RC5 itself is a flexible, symmetric block cipher that was designed to be fast and adaptable, with parameters you can adjust for word size, number of rounds, and key length to balance security and performance. Bruce Schneier is known for Blowfish and Twofish, Joan Daemen (with Vincent Rijmen) designed Rijndael (the AES), and Whitfield Diffie co-invented Diffie-Hellman key exchange. These are different contributions, while RC5 specifically credits Ronald Rivest as its designer.

RC5 was designed by Ronald Rivest. He’s a renowned cryptographer who co-developed the RSA public-key cryptosystem, and RC5 was introduced as part of the RC family of ciphers he developed. RC5 itself is a flexible, symmetric block cipher that was designed to be fast and adaptable, with parameters you can adjust for word size, number of rounds, and key length to balance security and performance.

Bruce Schneier is known for Blowfish and Twofish, Joan Daemen (with Vincent Rijmen) designed Rijndael (the AES), and Whitfield Diffie co-invented Diffie-Hellman key exchange. These are different contributions, while RC5 specifically credits Ronald Rivest as its designer.