In the common signature system , the signed document can be verified illimitably , anyone can verifies its validity with the group key . but in some special setting , large numbers of verifier are not appropriate , sometimes document can only be verified by some designated people . this paper proposes the designated - verifier group signature scheme with the udvs on acjt . at last this paper implements the multi - bank system with above schemes , remedies the limitation of forgoing schemes , and resolves the par value problem . the par value is designated by the bank , and it is binding with the signature , thus the problem of user cheating can be avoided 在普通的签名系统中,签名文件是可以无限验证的,即每个人都可以通过群公钥来验证其有效性,但在某些特殊领域,尤其是电子银行业务中,这样广泛的验证人群在某些情况下是不合适的,有时,某些特殊的签名文件只能有某些指定的验证者进行验证,本文在acjt方案的基础上,根据通用的指定验证者的方案构造了指定验证者的群签名方案。
