on the invisibility of designated confirmer signatures

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	on the invisibility of designated confirmer signatures
	Xia Fubiao; Wang Guilin; Xue Rui
	2011
会议名称	6th International Symposium on Information, Computer and Communications Security, ASIACCS 2011
会议录名称	Proceedings of the 6th International Symposium on Information, Computer and Communications Security, ASIACCS 2011
页码	268-276
会议日期	March 22,
会议地点	Hong Kong, China
收录类别	EI
出版地	United States
ISBN	9781450305648
部门归属	(1) School of Computer Science, University of Birmingham, Birmingham, B15 2TT, United Kingdom; (2) School of Computer Science and Software Engineering, University of Wollongong, Wollongong, NSW 2522, Australia; (3) State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Science, Beijing 100080, China
摘要	As an important cryptographic primitive, designated confirmer signatures are introduced to control the public verifiability of signatures. That is, only the signer or a semi-trusted party, called designated confirmer, can interactively assist a verifier to check the validity of a designated confirmer signature. The central security property of a designated confirmer signature scheme is called invisibility, which requires that even an adaptive adversary cannot determine the validity of an alleged signature without direct cooperation from either the signer or the designated confirmer. However, in the literature researchers have proposed two other related properties, called impersonation and transcript simulatability, though the relations between them are not clear. In this paper, we first explore the relations among these three invisibility related concepts and conclude that invisibility, impersonation and transcript simulatability forms an increasing stronger order. After that, we turn to study the invisibility of two designated confirmer signature schemes recently presented by Zhang et al. and Wei et al. By demonstrating concrete and effective attacks, we show that both of those two scheme fail to meet invisibility, the central security property of designated confirmer signatures. Copyright 2011 ACM.
关键词	Authentication Network Security
主办者	ACM Spec. Interest Group Secur., Audit, Control (SIGSAC)
内容类型	会议论文
URI标识	http://ir.iscas.ac.cn/handle/311060/14255
专题	信息安全国家重点实验室
推荐引用方式 GB/T 7714	Xia Fubiao,Wang Guilin,Xue Rui. on the invisibility of designated confirmer signatures[C]. United States,2011:268-276.

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