RC6 has been submitted as a candidate for the Advanced Encryption Standard (AES). Two important features of RC6 that were absent from its predecessor RC5 are a quadratic function and a fixed rotation. By examining simplified variants that omit these features we clarify their essential contribution to the overall security of RC6.
['Scott Contini', 'Ronald L. Rivest', 'Matthew J. B. Robshaw', 'Yiqun Lisa Yin']
Improved Analysis of Some Simplified Variants of RC6