A Secure Obfuscator for Encrypted Blind Signature Functionality

摘要: This paper introduces a new obfuscation called of encrypted blind signature. Informally, Alice is Signer and Bob Recipient. needs to sign message, but he does not want know what the message is. Furthermore, doesn’t anyone interactive process. So we present secure obfuscator for signature which makes interactions process unintelligible any third party, while still keeps original functionality We use schnorr’s scheme linear encryption as blocks construct obfuscator. Moreover, propose two security definitions: blindness w.r.t (EBS) one-more unforgeability(OMU) EBS obfuscator, prove them under Decisional Linear (DL) assumption hardness discrete logarithm, respectively. also demonstrate that our satisfies Average-Case Virtual Black-Box Property(ACVBP) dependent oracle, it indistinguishable secure. Our expands direction application obfuscation.