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NCUEIR > College of Science > math > Proceedings > Item 987654321/12210

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/12210

Title:	A New Key-insulated Signature and Its Novel Application
Authors:	Yu, Ching-Wen;Tseng, Yuh-Min;Wu, Tsu-Yang
Contributors:	數學系
Keywords:	Key-insulated;Signature;ID-based;Bilinear pairings;Proxy signature
Date:	2010-05
Issue Date:	2012-07-03T03:47:01Z
Publisher:	中華民國資訊安全學會
Abstract:	Recently, the notion of the key-insulated public- key system has been suggested to protect the security of users' private keys. A general idea of this system is changing the user's private key along with the time, but the user's public key remains unchanged. In this paper, we propose a new identity (ID)-based key-insulated signature scheme from bilinear pairings. As compared with the recently proposed ID-based key-insulated signature schemes, our proposed scheme has better performance in the batch verifying phase. For security analysis, our scheme is a provably secure key-insulated signature scheme in the random oracle model and under the computational Diffie-Hellman assumption. Meanwhile, to demonstrate the additional advantage of a key-insulated signature, we present a novel application based on the proposed scheme, called full delegation ID-based proxy signature scheme with time restriction. To our best knowledge, no such a proxy signature scheme is proposed until now.
Relation:	The 20th Cryptology and Information Security 2010 (CISC2010), : 75-80
Appears in Collections:	[math] Proceedings

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