CAJ | 학술논문

通过对何俊杰等提出的一个无证书部分盲签名方案进行安全性分析，发现方案存在公共信息被用户非法篡改的问题。为了保证公共信息的不被篡改，提出了一种基于 k‐CAA 问题和 ICDH 问题改进的无证书部分盲签名方案。随后对协议的正确性、部分盲性、安全性进行分析，且在随机预言机模型下证明了新方案对两类攻击者的适应性选择消息攻击是存在性不可伪造的。
통과대하준걸등제출적일개무증서부분맹첨명방안진행안전성분석，발현방안존재공공신식피용호비법찬개적문제。위료보증공공신식적불피찬개，제출료일충기우 k‐CAA 문제화 ICDH 문제개진적무증서부분맹첨명방안。수후대협의적정학성、부분맹성、안전성진행분석，차재수궤예언궤모형하증명료신방안대량류공격자적괄응성선택소식공격시존재성불가위조적。
The security of a certificateless partially blind signature scheme put forward by He Junjie et al was analyzed ,it was found that there was a common information tampered illegally by a user problem .In order to ensure that common information is not tampered ,an improved certificateless partially blind signature scheme based on the collusion attack algorithm with k‐traitors (k‐CAA) and inverse computational Diffie‐Hellman (IC‐DH) problem was proposed ,and then its correctness ,partially blind and security were analyzed .The new scheme was proved to be existentially unforgeable for the adaptive chosen message and the attacks from two kinds of adversaries in random oracle model .