Research Article
Improvements for Finding Impossible Differentials of Block Cipher Structures
Table 2
Summary of impossible differentials (IDs) of some well-known block ciphers structures found by different methods.
| | Block cipher | UID [14] | Wu-Wang [31] | This paper |
| | Gen-Skipjack | 16: | — | Same as UID | | Gen-CAST256 | 19: | — | Same as UID | | Four-Cell | 18: | — | Same as UID | | Gen-MARS | 11: | — | Same as UID | | Gen-RC6 | 9: | — | Same as UID | | 9: | | SMS4 | 11: | — | Same as UID | | Misty | — | — | | | SNAKE | — | — | | | | — | 8-round, 4 IDs | Same as Wu-Wang | | MIBS | — | 8-round, 6 IDs | 8-round, 10 IDs | | LBlock | — | 14-round, 80 IDs | Same as Wu-Wang | | E2 | — | 6-round, 56 IDs | Same as Wu-Wang |
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