Anonymous Proxy Signatures [chapter]

Georg Fuchsbauer, David Pointcheval
2008 Lecture Notes in Computer Science  
We define a general model for consecutive delegations of signing rights with the following properties: The delegatee actually signing and all intermediate delegators remain anonymous. As for group signatures, in case of misuse, a special authority can open signatures to reveal the chain of delegations and the signer's identity. The scheme satisfies a strong notion of non-frameability generalizing the one for dynamic group signatures. We give formal definitions of security and show them to be
more » ... isfiable by constructing an instantiation proven secure under general assumptions in the standard model. Our primitive is a proper generalization of both group signatures and proxy signatures and can be regarded as non-frameable dynamic hierarchical group signatures.
doi:10.1007/978-3-540-85855-3_14 fatcat:xannwvsl5jgaxgctkjhlutgkii