Download Information Security and Cryptology - ICISC’99: Second by Serge Vaudenay (auth.), JooSeok Song (eds.) PDF

By Serge Vaudenay (auth.), JooSeok Song (eds.)

This publication constitutes the completely refereed post-proceedings of the second one overseas convention on details safeguard and Cryptology, ICISC'99, held in Seoul, Korea, in December 1999.
The 20 revised complete papers provided including an invited paper have been conscientiously reviewed and chosen from a complete of sixty one submissions. The booklet is split into topical sections on cryptoanalysis and cryptographic layout; cryptographic conception and computation complexity; cryptographic protocols and authentication layout; electronic signatures and mystery sharing; and digital money, purposes, and implementation.

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Extra resources for Information Security and Cryptology - ICISC’99: Second International Conference Seoul, Korea, December 9-10, 1999 Proceedings

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Thus, even when Bank correctly guesses u1 , there are infinitely many solutions of the equation and she has no way of validating of her guess. However, Bank may be able to frame User by making a forged transcript by the known u1 unless User has the unknown u2 . 4 Privacy Enhaced Digital Cash System Our digital cash system consists of system setup, opening an account, the withdrawal protocol, the payment protocol and the deposit protocol. All the conventions are the same as that of Brands’ one. As mentioned already, we augment Brands’ scheme such that it has two secrets for User and the added secret is treated as the secret of the normal 3-move ZKIP technique.

The methods used in finding this modification are specific to Bluetooth, but could be easily adapted to other similar combiner generators. The technique involves a matrix describing potential approximations based on known non-zero linear correlations over the non-linear part of the memory update function. We also showed how any significant correlations over a combiner can be used to launch a divide and conquer attack against any combiner generator provided that sufficient amount of the output keystream is given.

Then the maximum differential and linear probabilities psds and qsds of the SDS function hold for psds ≤ pβd (D) and qsds ≤ q βl(D) . The above theorem is obtained easily by the maximality of p(or q) and the minimality of βd (D)(or βl (D)). Evaluation of practical security against DC and LC is based on this theorem. 3 Matrix Representation of Diffusion Layer Most diffusion layers of modern block ciphers of SPN structure are linear transformations on Z2n over some finite fields such as GF (2) or GF (2n ) and have one-to-one correspondence to appropriate matrix.

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