NDLI: Cryptanalysis of Chang-Lin-Lam's ID-based Multisignature Scheme

Content Provider	IEEE Xplore Digital Library
Author	Haifeng Qian Zhenfu Cao Licheng Wang Sheng Guo
Copyright Year	2006
Description	Author affiliation: Dept. of Comput. Sci. & Eng., Shanghai Jiao Tong Univ. (Haifeng Qian; Zhenfu Cao; Licheng Wang; Sheng Guo)
Abstract	Recently, Chang, Lin and Lam proposed an ID-based multisignature scheme without reblocking and predetermined signing order. Their scheme adopts users' id information as the public keys instead of random integers. They have claimed that it is computationally infeasible to derive the private key of Key Authentication Center (KAC) from the private keys of the authorized users, and the scheme has the property of resistance against collaboration attacks. However, we observed that their scheme cannot be applied in real world, for there are two defects in their scheme and the scheme doesn't satisfy with what they has claimed. The two drawbacks are: (1) not having an efficient verification algorithm (the signature almost cannot be verified for the exponent is too large). (2) Even if the signature can be verified, there would exist a forger within the same computation complexity of verification algorithm who can break the scheme (in other words, any one of the signing group can forge on any message for the whole signing group)
Sponsorship	STEMES/IMSCCS Conference, USA The University of Iowa, USA Zhejing Univ., China Harbin Eng. Univ., China
Starting Page	113
Ending Page	116
File Size	164899
Page Count	4
File Format	PDF
ISBN	0769525814
DOI	10.1109/IMSCCS.2006.206
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer science Identity-based encryption Public key Authentication Collaboration Public key cryptography Internet Security Digital signatures Contracts
Content Type	Text
Resource Type	Article

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