Download Advances in Cryptology — ASIACRYPT’98: International by Arjen K. Lenstra (auth.), Kazuo Ohta, Dingyi Pei (eds.) PDF

By Arjen K. Lenstra (auth.), Kazuo Ohta, Dingyi Pei (eds.)

ASIACRYPT’98, the foreign convention protecting all elements of conception and alertness of cryptology and knowledge defense, is being held at Beijing Friendship inn from October 18 to 22. this is often the fourth of the Asiacrypt meetings. ASIACRYPT’98 is subsidized by way of the country Key Laboratory of knowledge safeguard (SKLOIS), college of technology and know-how of China (USTC), and the Asiacrypt steerage Committee (ASC), in cooperation with the overseas organization for Cryptology learn (IACR). The 16-member application Committee equipped the clinical application and regarded 118 submissions. of those, 32 have been authorized for presentation. The authors’ affiliations of the 118 submissions and the 32 approved papers variety over 18 and thirteen nations or areas, respectively. The submitted model of every paper used to be despatched to all individuals of this system Committee and was once broadly tested by means of at the very least 3 committee individuals and/or outdoor specialists. The evaluation approach used to be carefully blinded and the anonymity of every submission are maintained till the choice used to be accomplished. We the normal coverage that every member of this system Committee can be an writer of at such a lot one authorized paper. those court cases comprise the revised models of the 32 contributed talks in addition to a brief word written by way of one invited speaker. reviews from this system Committee have been taken under consideration within the revisions. although, the authors (not the committee) undergo complete accountability for the contents in their papers.

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Read or Download Advances in Cryptology — ASIACRYPT’98: International Conference on the Theory and Application of Cryptology and Information Security Beijing, China, October 18–22, 1998 Proceedings PDF

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Extra info for Advances in Cryptology — ASIACRYPT’98: International Conference on the Theory and Application of Cryptology and Information Security Beijing, China, October 18–22, 1998 Proceedings

Sample text

We then study more general schemes, still using the idea of hiding matrix equations, such as HM . An extended version of this paper can be obtained from the authors. 1 Introduction What is – at the present – the asymmetric signature algorithm with the most simple smartcard implementation (in terms of speed and RAM needed), and not broken ? We think that it is one simple variation of the Matsumoto-Imai C ∗ algorithm that we present in part I. C ∗ was presented in [4] and [7], and was broken in [8], due to unexpected algebraic properties.

Fortunately, given sufficiently many msb’s of d, we may compute k directly, eliminating it as an unknown from equation 4. Once k is revealed, we are left with two unknowns, d and s which we recover using various methods. The main tool for √ discovering k is presented in the following theorem. It shows that as long as e < N we can find k given only log2 e msb bits of d. The theorem produces a small constant size interval containing k. As always, we try all possible values of k in the interval until our attack algorithm succeeds.

We then study more general schemes, still using the idea of hiding matrix equations, such as HM . An extended version of this paper can be obtained from the authors. 1 Introduction What is – at the present – the asymmetric signature algorithm with the most simple smartcard implementation (in terms of speed and RAM needed), and not broken ? We think that it is one simple variation of the Matsumoto-Imai C ∗ algorithm that we present in part I. C ∗ was presented in [4] and [7], and was broken in [8], due to unexpected algebraic properties.

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