Study On Attribute-based Strong Designated Verifier Signature

In the modern information society, digital signature technology has been widely used invarious fields in order to provide data consistency checking and authorization certificate. Inthe standard digital signature, anybody can verify the validation of the signature, however, inmany applications we need to protect the identity of the signer or avoid the publicly verifiableproperty of the signature and only the designated receiver can verify the validation of thesignature. For example, in electric-voting system, a voter wish to protect his identity privacyand only designated verifier could confirm the signature is valid, but the verifier cannot provethe validity to any third party even he publish own private key. In the e-commerce auction,bidders can bid on their own sign, and then send to the seller, however the seller may wantto tell others the price bid in order to seek the best interests of dealers. The bidders don'twant the others trust the price bid from the seller, so he need the deniable property of hissignature.In order to solve the above problem, the Designated Verifier Signature (DVS) demandsthat only the designated receiver could verify the validation of the signature, and the verifiercannot prove to any third party that the signature is authenticated by the sender. The strongDVS requires that the verify algorithm could passed only with the help of verifier's privatekey.In the attribute-based cryptography, ciphertext contains series of marked properties ofthe label, the decryption key associated with the access structure which could control thedecryption permissions flexibility. Because the attribute-based encryption (ABE) gives moreflexible decryption strategy between ciphertext and the private key, it could widely be usedin fault-tolerant biological cryptographic, sharing the audit log information, broadcast en-cryption and so on.This paper extends the strong designated verifier signature by importing attribute-basedcryptography and proposed the first attributed-based strong designated verifier signature inwhich the signature contains attributes information and the verifier's private key associated with attributed based access structure. The designated verifier could construct a signaturethat is indistinguishable with the sender's. The scheme could solve more complex designatedstrategy applications of the DVS.So far, this kind of signature has not yet been studied, and we will formally define theattribute-based strong designated verifier signature (AB-SDVS) and its security model. Wefirst propose an ABSDVS scheme and then analyze its security using the provable securitytheory.The ABSDVS can be more effectively addressed the conflict of authentication and pri-vacy and has more strong strategy to select the verifier; it will play a significant role ine-commerce, e-government, and network security certification and so on.