Mod n Cryptanalysis, with Applications Against RC5P and M6

@inproceedings{Kelsey1999ModNC,
  title={Mod n Cryptanalysis, with Applications Against RC5P and M6},
  author={John Kelsey and Bruce Schneier and David A. Wagner},
  booktitle={FSE},
  year={1999}
}
We introduce “mod n cryptanalysis,” a form of partitioning attack that is effective against ciphers which rely on modular addition and bit rotations for their security. We demonstrate this attack with a mod 3 attack against RC5P, an RC5 variant that uses addition instead of xor. We also show mod 5 and mod 257 attacks against some versions of a family of ciphers used in the FireWire standard. We expect mod n cryptanalysis to be applicable to many other ciphers, and that the general attack is… CONTINUE READING

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