Flaws in Differential Cryptanalysis of Skipjack
- Louis Granboulan
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This paper is motivated by some results presented by Knudsen, Robshaw and Wagner at Crypto’99 , that described many attacks of reduced versions of Skipjack, some of them being erroneous.
Differential cryptanalysis is based on distinguishers, any attack should prove that the events that triggers the analysis has not the same probability for the cipher than for a random function. In particular, the composition of differential for successive parts of a cipher should be done very carefully to lead to an attack.
This revised version of the paper includes the exact computations of some probabilities and repairs the attack of the first half of Skipjack.
- Biham, E., Biryukov, A., Shamir, A. Cryptanalysis of skipjack reduced to 31 rounds using impossible differentials. In: Stern, J. eds. (1999) Advances in Cryptology — EUROCRYPT’99. Springer, Berlin Heidelberg, pp. 12-23
- Biham, E., Shamir, A. (1991) Differential cryptanalysis of DES-like cryptosystems. Journal of Cryptology 4: pp. 3-72 CrossRef
- Knudsen, L. R., Robshaw, M.J.B., Wagner, D. Truncated differentials and skipjack. In: Wiener, M. eds. (1999) Advances in Cryptology — CRYPTO’99. Springer, Berlin Heidelberg, pp. 165-180 CrossRef
- Lai, X., Massey, J. L., Murphy, S. Markov ciphers and differential cryptanalysis. In: Davies, D. W. eds. (1991) Advances in Cryptology, proceedings of Eurocrypt’91. Springer, Berlin Heidelberg, pp. 17-38
- Flaws in Differential Cryptanalysis of Skipjack
- Book Title
- Fast Software Encryption
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- 8th International Workshop, FSE 2001 Yokohama, Japan, April 2–4, 2001 Revised Papers
- pp 328-335
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- Lecture Notes in Computer Science
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- Springer Berlin Heidelberg
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- Springer-Verlag Berlin Heidelberg
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