Abstract | ||
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Mediated Signature Scheme provides an efficient method for fast revocation of a user's identity in identity (ID)-based cryptosystems. The only ID-based mediated signature scheme was proposed by Cheng et al. from bilinear pairing in [8]. Unfortunately, their scheme has an inherent flaw that the PKG is fully capable to generate a valid mediated signature of some message on behalf of its signers by only utilizing the public information of the system. In this paper, an efficient ID-based mediated signature scheme without trusted PKG is proposed. Compared with the scheme [8], the proposed scheme has other property besides achieving immediate revocation of a signer's ID. That is, proposed scheme is ID-based, but without any assumption of pre-fixed trusted relationship between users and PKG, which effectively solves the problem that exists in some existing ID-based public key cryptosystems in which a trusted PKG and key escrow are needed. |
Year | DOI | Venue |
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2011 | null | INFORMATICA-JOURNAL OF COMPUTING AND INFORMATICS |
Keywords | Field | DocType |
ID-based signature, ID-based mediated signature, without trusted PKG, immediate revocation, GDH group | Computer science,Computer security,Public key cryptosystem,Revocation,Cryptosystem,Bilinear pairing,Key escrow | Journal |
Volume | Issue | Citations |
35 | 1 | 0 |
PageRank | References | Authors |
0.34 | 12 | 2 |
Name | Order | Citations | PageRank |
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Xiaofeng Wang | 1 | 94 | 9.88 |
Shangping Wang | 2 | 57 | 13.40 |