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On The Invisibility Of Designated Confirmer Signatures, Fubiao Xia, Guilin Wang, Rui Xue
On The Invisibility Of Designated Confirmer Signatures, Fubiao Xia, Guilin Wang, Rui Xue
Dr Guilin Wang
As an important cryptographic primitive, designated con- rmer signatures are introduced to control the public veria- bility of signatures. That is, only the signer or a semi-trusted party, called designated conrmer, can interactively assist a verier to check the validity of a designated conrmer sig- nature. The central security property of a designated con- rmer signature scheme is called invisibility, which requires that even an adaptive adversary cannot determine the valid- ity of an alleged signature without direct cooperation from either the signer or the designated conrmer. However, in the literature researchers have proposed two other related properties, called impersonation …