Cryptanalytic attacks on the multiplicative knapsack cryptosystem and on Shamir's fast signature scheme

In 1996, Jakobsson, Sako, and Impagliazzo and, on the other hand, Chaum introduced the notion of designated verifier signatures to solve some of the intrinsic problems of undeniable signatures. The generalization of this concept was formally ...

Two extensions of RST (Rivest, Shamir and Taumann) ring signature are proposed which keep the form of RST ring signature unchanged. One extension is to implement the verifiability property with which the real signer is able to prove that she actually ...

In 2008, Lee-Chang pointed out that Saeednia et al.'s scheme would reveal the identity of the signer if the secret key of the signer is compromised. Then, they proposed a new strong designated verifier signature scheme that provides signer ambiguity, ...