Multi-designated verifiers signatures: anonymity without encryption

In 1996, Jakobsson, Sako, and Impagliazzo and, on the other hand, Chaum proposed the notion of designated verifier signature to solve some of the intrinsic problems of undeniable signatures. The generalization of this concept, suggested by Desmedt at Crypto'03's rump session, was formally investigated by Laguillaumie and Vergnaud at ICICS'04 as multi-designated verifiers signatures. The protection of the signer's privacy, as defined in that...