Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely: As two special digital signatures, group signature and designatedverifier signature play very important roles in the e-commerce. A group signature scheme allows a group member to anonymously sign message on behalf of the group, In case of a dispute, the group manager can reveal the actual identity of signer. Group signature is widely used in e-cash, e-voting, e-bid and so on. In a designated verifier signature scheme, only the designated verifier can verify the validity of a signature. Thus, the designated verifier signature is widely applied in the copyright-protect. Recently, Zhou et.al presented a dynamicgroup signature scheme with forward security, and Zhang et.al gave an efficient ID-based designated verifiersignature scheme. Unfortunately, in this work  show that Zhou et.al's group signature is universally forgeable, Namely, any one can forge a group signature on another message by a given signature, then an improved vision is presented; And  also show that Zhang et.al's scheme is delegatable, namely, a third party can produce a signature on message m by the revealed side information. Finally,  give the corresponding attack on the two signature schemes.
['Jianhong Zhang', 'Qin Geng']
I am writing a research paper on a idea On the Security of Group Signature Scheme and Designated Verifier Signature Scheme
[{"from": "human", "value": "I am writing a research paper on a idea On the Security of Group Signature Scheme and Designated Verifier Signature Scheme"}, {"from": "gpt", "value": "Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely: As two special digital signatures, group signature and designatedverifier signature play very important roles in the e-commerce. A group signature scheme allows a group member to anonymously sign message on behalf of the group, In case of a dispute, the group manager can reveal the actual identity of signer. Group signature is widely used in e-cash, e-voting, e-bid and so on. In a designated verifier signature scheme, only the designated verifier can verify the validity of a signature. Thus, the designated verifier signature is widely applied in the copyright-protect. Recently, Zhou et.al presented a dynamicgroup signature scheme with forward security, and Zhang et.al gave an efficient ID-based designated verifiersignature scheme. Unfortunately, in this work  show that Zhou et.al's group signature is universally forgeable, Namely, any one can forge a group signature on another message by a given signature, then an improved vision is presented; And  also show that Zhang et.al's scheme is delegatable, namely, a third party can produce a signature on message m by the revealed side information. Finally,  give the corresponding attack on the two signature schemes."}]