Input (grade 10): It was designed by Ron Rivest, Matt Robshaw, Ray Sidney, and Yiqun Lisa Yin to meet the requirements of the Advanced Encryption Standard (AES) competition. The algorithm was one of the five finalists, and was also submitted to the NESSIE and CRYPTREC projects.
Output (grade 9): It was designed by Ron Rivest, Matt Robshaw, Ray Sidney, and Yiqun Lisa Yin, and was also submitted to the NESSIE and CRYPTREC projects.