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发明授权
CN106789019B 一种无证书部分盲签名方法和装置 有权

一种无证书部分盲签名方法和装置
摘要：
本发明适用于信息安全技术领域，提供了一种无证书部分盲签名方法，包括建立一个公开系统参数params＝{G1,G2,P,e,g,H0,H1,H2,Ppub}；签名者提取其私钥为提取公钥为签名者随机选择并计算z＝H0(c)和R＝rP，并把R发送给签名请求者；签名请求者接受到R后，随机选择盲化因子并计算z＝H0(c)、R′＝αR,h′＝H2(m,z,y),h＝α‑1(β‑h′)，并把h发送给签名者；签名者接收到h后，计算并把S发送给签名请求者；签名请求者进行脱盲工作，计算S′＝αS，得到消息m和协商消息c的签名为σ＝(y,h′,S′)；验证者进行签名验证。本发明有效解决了无证书部分盲签名中因协商公共信息篡改而带来的安全性问题。
摘要（英）：

The invention is applicable to the technical field of information security and provides a CL-PBS (certificateless partially blind signature) method. The method comprises the steps as follows: a public system parameter params=[G1, G2, P, e, g, H0, H1, H2, Ppub] is established; a signer extracts a private key shown in the specification and a public key shown in the specification; a signer randomly selects an icon shown in the specification, calculates z=H0(c) and R=rP and sends R to a signature requester; the signature requester randomly selects a blinding factor shown in the specification after receiving the R, calculates formulas shown in the specification and sends h to the signer; the signer calculates a formula shown in the specification and sends S to the signature requester after receiving h; the signature requester conducts de-blinding work and calculates S'=alphaS to obtain a signature sigma=(y, h', S') of a message m and a consultation message c; a verifier verifies the signature. The method effectively solves the security problems caused by tapering of consultation public information in CL-PBS.

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