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Security and performance of server-aided RSA computation protocols SCIE

Title
Security and performance of server-aided RSA computation protocols
Authors
Lim, CHLee, PJ
Date Issued
1995-01
Publisher
SPRINGER-VERLAG BERLIN
Abstract
This paper investigates various security issues and provides possible improvements on server-aided RSA computation schemes, mainly focused on the two-phase protocols, RSA-S1M and RSA-S2M, proposed by Matsumoto et al. [4]. We first present new active attacks on these protocols when the final result is not checked. A server-aided protocol is then proposed in which the client can check the computed signature in at most six multiplications irrespective of the size of the public exponent. Next we consider multi-round active attacks on the protocol with correctness check and show that parameter restrictions cannot defeat such attacks. We thus assume that the secret exponent is newly decomposed in each run of the protocol and discuss some means of speeding up this preprocessing step. Finally, considering the implementation-dependent attack, we propose a new method for decomposing the secret and performing the required computation efficiently.
Keywords
ATTACK
URI
https://oasis.postech.ac.kr/handle/2014.oak/21869
ISSN
0302-9743
Article Type
Article
Citation
LECTURE NOTES IN COMPUTER SCIENCE, vol. 963, page. 70 - 83, 1995-01
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이필중LEE, PIL JOONG
Dept of Electrical Enginrg
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