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Convertible Group Undeniable Signatures
[chapter]
2003
Lecture Notes in Computer Science
Group undeniable signatures are like ordinary group signatures except that verifying signatures needs the help of the group manager. In this paper, we propose a convertible group undeniable signature scheme in which the group manager can turn all or selective signatures, which are originally group undeniable signatures, into ordinary group signatures without compromising security of the secret key needed to generate signatures. The proposed scheme also allows the group manager to delegate the
doi:10.1007/3-540-36552-4_4
fatcat:3mlopgphlzabnjt36p3f5whlqq