International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Kitae Kim

Publications

Year
Venue
Title
2010
EPRINT
Security Analysis of a Threshold Proxy Signature Scheme
Kitae Kim Dahun Nyang
The t-out-of-n threshold proxy signatures allow an original signer to delegate his signing capability to a group of proxy signers, and t or more proxy signers can generate valid signatures by cooperating. Recently, Liu and Huang proposed a variant of threshold proxy signature scheme in which all proxy signers remain anonymous. The authors claimed their construction satisfies unforgeability, proxy signer's deviation, identifiability, undeniability and verifiability. In this paper, however, we show that their scheme does not provide the proxy signer's deviation and identifiability requirements.

Coauthors

Dahun Nyang (1)