In 2004, Libert and Quisquater proposed an identity based undeniable signature scheme using pairings over elliptic curves. In this article, we show that the scheme is not secure. ...
Zichen Li, C. F. Chong, Lucas Chi Kwong Hui, Siu-M...
In this paper, we present the first certificateless undeniable signature scheme. The scheme does not suffer from the key escrow problem, which is inherent in identity based crypto...
Restrictive blind signatures allow a recipient to receive a blind signature on a message not known to the signer but the choice of message is restricted and must conform to certain...
Abstract. Known compact e-cash schemes are constructed from signature schemes with efficient protocols and verifiable random functions. In this paper, we introduce a different ap...
Directed signature scheme allows only a designated verifier to check the validity of the signature issued to him; and at the time of trouble or if necessary, any third party can v...
Rongxing Lu, Xiaodong Lin, Zhenfu Cao, Jun Shao, X...