Advances in Cryptology — CRYPTO 2002: 22nd Annual by Sean Murphy, Matthew J.B. Robshaw (auth.), Moti Yung (eds.)

By Sean Murphy, Matthew J.B. Robshaw (auth.), Moti Yung (eds.)

Crypto 2002, the twenty second Annual Crypto convention, used to be backed via IACR, the overseas organization for Cryptologic learn, in cooperation with the IEEE machine Society Technical Committee on safeguard and privateness and the pc technology division of the college of California at Santa Barbara. it really is released as Vol. 2442 of the Lecture Notes in computing device technology (LNCS) of Springer Verlag. word that 2002, 22 and 2442 are all palindromes... (Don’t nod!) Theconferencereceived175submissions,ofwhich40wereaccepted;twos- missionsweremergedintoasinglepaper,yieldingthetotalof39papersaccepted for presentation within the technical application of the convention. during this lawsuits quantity you'll ?nd the revised models of the 39 papers that have been offered on the convention. The submissions symbolize the present country of labor within the cryptographic group world wide, masking all parts of cryptologic learn. in truth, many fine quality works (that absolutely should be released in other places) couldn't be approved. this can be because of the aggressive nature of the convention and the demanding job of choosing a software. I desire to thank the authors of all submitted papers. certainly, it's the authors of all papers who've made this convention attainable, whether or now not their papers have been permitted. The convention application was once additionally immensely bene?ted through plenary talks.

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By Sean Murphy, Matthew J.B. Robshaw (auth.), Moti Yung (eds.)

Crypto 2002, the twenty second Annual Crypto convention, used to be backed via IACR, the overseas organization for Cryptologic learn, in cooperation with the IEEE machine Society Technical Committee on safeguard and privateness and the pc technology division of the college of California at Santa Barbara. it really is released as Vol. 2442 of the Lecture Notes in computing device technology (LNCS) of Springer Verlag. word that 2002, 22 and 2442 are all palindromes... (Don’t nod!) Theconferencereceived175submissions,ofwhich40wereaccepted;twos- missionsweremergedintoasinglepaper,yieldingthetotalof39papersaccepted for presentation within the technical application of the convention. during this lawsuits quantity you'll ?nd the revised models of the 39 papers that have been offered on the convention. The submissions symbolize the present country of labor within the cryptographic group world wide, masking all parts of cryptologic learn. in truth, many fine quality works (that absolutely should be released in other places) couldn't be approved. this can be because of the aggressive nature of the convention and the demanding job of choosing a software. I desire to thank the authors of all submitted papers. certainly, it's the authors of all papers who've made this convention attainable, whether or now not their papers have been permitted. The convention application was once additionally immensely bene?ted through plenary talks.

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Extra resources for Advances in Cryptology — CRYPTO 2002: 22nd Annual International Cryptology Conference Santa Barbara, California, USA, August 18–22, 2002 Proceedings

Example text

This decryption is either a truncation of M0 or a truncation of M1 . The attacker guesses b accordingly. In order to check that the attacker always succeeds, it suffices to verify the validity of the tag T2 for the truncated message. For the original message, T2 was computed as F (ki , Mb [i], w). When decrypting the truncated message, w is the same (since T1 has not changed), and Mb [j] = Mb [i] by choice of the challenge messages. Moreover, since Cb [j] = Cb [i] thanks to the collision check performed by the attacker, we have kj = ki .

For j = 1 to − 1 we have where L Sj = M · (< 2j >, < r >), where (< 2j >, < r >) is the boolean vector of length ¯ + 1 + n composed with the binary representation of 2j on log L ¯ + 1 bits log L and the binary representation of r on n bits. Furthermore S0 = M · (< 2L + 1 >, < r >), where L is the ciphertext length. Then the ciphertext is generated as follows: the message is divided into − 1 blocks M [1], . . , M [ − 1], of n bits each. The ciphertext is defined by: C[0] = EK1 (r) N [0] = C[0] for i = 1 to − 1 do N [i] = EK1 (M [i] ⊕ N [i − 1]) C[i] = N [i] ⊕ Si end for C[ ] = EK1 (checksum ⊕ N [l − 1]) ⊕ S0 , where checksum = This is summarized in figure 2.

Robshaw. Further comments on the structure of Rijndael. gov/encryption/aes, August 2000. 21. National Institute of Standards and Technology. Advanced Encryption Standard. FIPS 197. 26 November 2001. 22. J. Patarin. Hidden field equations (HFE) and isomorphisms of polynomials (IP): Two new families of asymmetric algorithms. In U. Maurer, editor, Proceedings of Eurocrypt ’96, LNCS 1070, pages 33–48, Springer-Verlag, 1996. 23. R. Schroeppel. Second round comments to NIST. gov/encryption/aes/, 2000.

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