By Alex Biryukov, Christophe De Cannière, Michaël Quisquater (auth.), Matt Franklin (eds.)
Crypto 2004, the twenty fourth Annual Crypto convention, was once subsidized by means of the Int- nationwide organization for Cryptologic study (IACR) in cooperation with the IEEE computing device Society Technical Committee on safeguard and privateness and the pc technology division of the collage of California at Santa Barbara. this system committee permitted 33 papers for presentation on the conf- ence. those have been chosen from a complete of 211 submissions. each one paper bought no less than 3 self sustaining stories. the choice approach incorporated a web based dialogue section, and a one-day software committee assembly at manhattan U- versity. those court cases contain up-to-date types of the 33 authorised papers. The authors had a number of weeks to revise them, aided through reviews from the reviewers. despite the fact that, the revisions weren't subjected to any editorial overview. Theconferenceprogramincludedtwoinvitedlectures.VictorShoup’sinvited speak was once a survey on selected ciphertext safeguard in public-key encryption. Susan Landau’s invited speak was once entitled “Security, Liberty, and digital Commu- cations”. Her prolonged summary is incorporated in those complaints. We persisted the culture of a Rump consultation, chaired by way of Stuart Haber. these shows (always brief, frequently severe) usually are not integrated here.
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Additional info for Advances in Cryptology – CRYPTO 2004: 24th Annual International Cryptology Conference, Santa Barbara, California, USA, August 15-19, 2004. Proceedings
839 of Lecture Notes in Computer Science, pp. 26–39, Springer-Verlag, 1994. 6. L. R. Knudsen and J. E. Mathiassen, “A chosen-plaintext linear attack on DES,” in Fast Software Encryption, FSE 2000 (B. ), vol. 1978 of Lecture Notes in Computer Science, pp. 262–272, Springer-Verlag, 2001. 7. L. R. Knudsen and M. J. B. Robshaw, “Non-linear approximations in linear cryptanalysis,” in Proceedings of Eurocrypt’96 (U. ), no. 1070 in Lecture Notes in Computer Science, pp. 224–236, Springer-Verlag, 1996.
2 Key Dependence in Bi-linear Attacks Another important property of bi-linear cryptanalysis is that the existence of a bias for one characteristic does frequently depend on the key. This does not really happen for LC applied DES, because in DES all key bits are combined linearly and a linear equation will be true with probability either or depending on the key. However it will happen for LC and other ciphers, if key bits are involved in a more complex way, for example for ICE . In bi-linear cryptanalysis, the behaviour becomes complex already when the key bits are combined linearly as in DES.
Computing distances. In order to compare the likelihoods of different keys, we need to evaluate the distance for all classes The vectors and are both When calculating this distance as a sum of squares, most terms do not depend on however. This allows the distance to be computed very efficiently, by summing only terms. 3 Attack Algorithm MD (distinguishing/key-recovery) The main limitation of Algorithm MK 1 and MK 2 is the bound on the number of key classes In this section, we show that this limitation disappears if our sole purpose is to distinguish an encryption algorithm from a random permutation R.
Advances in Cryptology – CRYPTO 2004: 24th Annual International Cryptology Conference, Santa Barbara, California, USA, August 15-19, 2004. Proceedings by Alex Biryukov, Christophe De Cannière, Michaël Quisquater (auth.), Matt Franklin (eds.)