NDLI: About the security for HW threshold proxy signature scheme with self-certified public key system

Content Provider	IEEE Xplore Digital Library
Author	Fengying Li Qingshui Xue Jiping Zhang Zhenfu Cao
Copyright Year	2009
Description	Author affiliation: Dept. of Computer Science and Engineering Shanghai Jiao Tong University Shanghai, China (Zhenfu Cao) \|\| School of techniques Shanghai Jiaotong University Shanghai, China (Jiping Zhang) \|\| Dept. of Education Information Technology East China Normal University Shanghai, China (Fengying Li; Qingshui Xue)
Abstract	In a (t, n) threshold proxy signature scheme, one original signer delegates a group of n proxy signers to sign on behalf of the original signer. When the proxy signature is created, at least t proxy signers cooperate to produce valid proxy signatures and any less than t proxy signers can't cooperatively generate valid proxy signatures. Self-certified public key systems have attracted more and more attention because of its advantages. In 2005, Hsu and Wu designed a self-certified threshold proxy signature scheme with message recovery, nonrepudiation and traceability, which is based on Hsu et al.'s self-certified public key system. Park et al. showed that Hsu and Wu's self-certified threshold proxy signature scheme is insecure against the malicious original signer in 2006. That is, Hsu and Wu's scheme suffers from the cheat attack, where a malicious original signer can cheat CA into extracting a proxy signing key of a proxy signer. We analyzed Park et al's security analysis for Hsu and Wu's scheme and pointed out that the cheat attack proposed by Park et al. can't succeed. In one hand, in self-certified public system, users cannot freely change their private or public keys. If users want to change their private or public keys, CA has some corresponding strategy to limit users' behaviors. In the other hand, if some disagreement about the forged threshold proxy signature occurs, there are two solutions to deal with it. One solution depends on the help of CA and the other solution relies on the help of the delegated proxy signer.
Starting Page	1
Ending Page	5
File Size	210506
Page Count	5
File Format	PDF
ISBN	9781424443376
DOI	10.1109/CHINACOM.2009.5339886
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	threshold proxy signature Proxy signature Information technology Sun Computer science Public key Information security Self-certified Computer science education Systems engineering education Cryptography Computer security Protection Digital signatures
Content Type	Text
Resource Type	Article

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