| Summary: | 碩士 === 淡江大學 === 資訊工程學系資訊網路與通訊碩士班 === 102 === Though the designated verifier signatures provide signer ambiguity, there is no identity privacy protection for the designated verifier who has believed true designated verifier signatures. To protect the designated verifier’s identity privacy, an ambiguously designated verifier signature scheme with one-out-of-many verifier ambiguity is proposed. Even though the designated signatures are believed to be true, the designated verifier is still hidden by one-out-of-many verifier ambiguity. Moreover, in our scheme, a disavowability mechanism is proposed to help the real signer to clarify his/her innocence.
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