International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Qin Wang

Publications

Year
Venue
Title
2004
EPRINT
Security Arguments for Partial Delegation with Warrant Proxy Signature Schemes
Qin Wang Zhenfu Cao
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.

Coauthors

Zhenfu Cao (1)