Taizo Shirai, Bart Preneel (auth.), Pil Joong Lee (eds.)'s Advances in Cryptology - ASIACRYPT 2004: 10th International PDF

By Taizo Shirai, Bart Preneel (auth.), Pil Joong Lee (eds.)

The tenth Annual ASIACRYPT 2004 was once held in Jeju Island, Korea, d- ing December 5–9, 2004. This convention used to be equipped by way of the overseas organization for Cryptologic examine (IACR) in cooperation with KIISC (- rean Institute of data safeguard and Cryptology) and IRIS (International learn middle for info protection) at ICU (Information and Communi- tionsUniversity),andwas?nanciallysupportedbyMIC(MinistryofInformation and communique) in Korea. The convention acquired, from 30 international locations, 208 submissions that symbolize the present nation of labor within the cryptographic neighborhood around the globe, protecting all parts of cryptologic study. each one paper, with out the authors’ details, was once reviewed by way of no less than 3 contributors of this system committee, and the papers (co-)authored via participants of this system committee have been reviewed through at the very least six individuals. We additionally blinded the reviewers’ names one of the reviewers until eventually the ?nal determination, by utilizing pseudonyms. The stories have been then by way of deep discussions at the papers, which significantly contributed to the standard of the ?nal choice. more often than not, huge reviews have been despatched to the authors. between 208 submissions, this system committee chosen 36 papers. submissions have been merged right into a unmarried paper, yielding the whole of 35 papers acceptedforpresentationinthetechnicalprogramoftheconference.Manyhi- caliber works couldn't be authorised due to the aggressive nature of the convention and the demanding job of choosing a software. those lawsuits comprise revised models of the accredited papers. those revisions haven't been checked for correctness, and the authors endure complete accountability for the contents in their papers.

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Additional info for Advances in Cryptology - ASIACRYPT 2004: 10th International Conference on the Theory and Application of Cryptology and Information Security, Jeju Island, Korea, December 5-9, 2004. Proceedings

Example text

The XEX construction. Generalizing the two examples above, we have the following definition. n n Definition 2 (XEX). Let E: K × {0, 1} → {0, 1} be a blockcipher, let α1 , . . , αk ∈ F∗2n , and let I1 , . . , Ik ⊆ Z. ik ik i1 i2 by EK (M ) = EK (M ⊕ ∆) ⊕ ∆ where ∆ = α1 α2 · · · αk N and N = EK (N ). The XE construction. As made clear in the work of Liskov, Rivest, and T (M ) = EK (M ⊕∆)⊕∆ aim for chosenWagner [10], constructions of the form EK ciphertext attack (CCA) security, while for chosen-plaintext attack (CPA) security one can omit the outer xor.

34 C. Gentry and Z. Ramzan Fig. 1. , the adversary has black-box access to P and P −1 . The diagram on the right depicts our scheme in which the permutation oracle is instantiated by a Feistel network consisting of publicly-accessible random function oracles f, g of DESX [KR96] as a proof that Even-Mansour is pseudorandom. Recall that in DESX, the Even-Mansour random permutation is supplanted with a keyed block cipher, such as DES. The Kilian-Rogaway proof allowed the adversary oracle access to the internal permutation P (modeled as an ideal block cipher) as well as P −1 , to simulate that an adversary had correctly guessed the key – this maneuver isolates the benefits of the pre- and post-whitening keys.

A Tweakable Blockciphers Implicit in Prior Work When tweaks increase in sequence, the most efficient constructions formerly known for a tweakable blockcipher are those implicit in earlier modes [4, 5, 9, 15], recast in view of Liskov, Rivest, and Wagner [10]. In particular: Jutla [9] might be seen as suggesting a construction (among others) of n n n N,i E: (K × K ) × ({0, 1} × Z+ p ) × {0, 1} → {0, 1} by way of EKK (X) = EK (X ⊕ ∆) ⊕ ∆ where ∆ = i mod p and = EK (N ) and p is the largest prime less than 2n .

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