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Paper 2004/315

Security Arguments for Partial Delegation with Warrant Proxy Signature Schemes

Qin Wang, Zhenfu Cao

Abstract

Proxy signature is an important cryptographic primitive and has been suggested in numerous applications. In this paper, we present an attack on the aggregate-signature-based proxy signature schemes, then point out there are two flaws in BPW notion of security for proxy signature. Furthermore, we give arguments for partial delegation with warrant proxy signature schemes. We construct a new proxy signature scheme and prove that it is secure against existentially forgery on adaptively chosen-message attacks and adaptively chosen-warrant attacks under the random oracle model.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
digital signatureproxy signaturepartial delegation with warrantprovable security.
Contact author(s)
chhwangqin @ sjtu edu cn
cao-zf @ cs sjtu edu cn
History
2004-11-17: received
Short URL
https://ia.cr/2004/315
License
Creative Commons Attribution
CC BY
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