CAJ | 학술논문

基于双线性对的无证书密码系统去除了公钥基础设施（PKI）中复杂的证书管理问题以及基于身份密码系统（IBC）固有的密钥托管问题。无需配对的无证书密码系统去除了耗时的双线性对运算，在不损安全性的同时进一步提高了无证书密码系统的效率。门限签名是标准数字签名扩展，由多个签名者共同为同一消息提供签名服务。基于无信赖者的秘密共享技术和无需配对的无证书密码技术，提出一个无需配对、无可信中心环境下的无证书门限签名方案。该方案可用于无可信服务器的分布式系统。分析表明，该方案具有较好的安全性、高效性且不依赖可信中心节点。
기우쌍선성대적무증서밀마계통거제료공약기출설시（PKI）중복잡적증서관리문제이급기우신빈밀마계통（IBC）고유적밀약탁관문제。무수배대적무증서밀마계통거제료모시적쌍선성대운산，재불손안전성적동시진일보제고료무증서밀마계통적효솔。문한첨명시표준수자첨명확전，유다개첨명자공동위동일소식제공첨명복무。기우무신뢰자적비밀공향기술화무수배대적무증서밀마기술，제출일개무수배대、무가신중심배경하적무증서문한첨명방안。해방안가용우무가신복무기적분포식계통。분석표명，해방안구유교호적안전성、고효성차불의뢰가신중심절점。
Certificateless cryptography based on bilinear pairings resolves the problems of complicated certificate management in the Public Key Infrastructure (PKI) and inherent key escrow problem in the Identity-Based Cryptography (IBC). Certificateless cryptography without pairing eliminates time-consuming bilinear pairings and further increases the efficiency of certificateless cryptography without losing safety. Threshold signature is an extension of the standard digital signature, in which several signers are required to provide signature service cooperatively for the same message. Based on secret sharing without a trusted party and certificateless cryptography without pairing, this paper proposes a certificateless threshold signature scheme without paring and trusted center, which can be adopted in distributed systems without trusted server. Analysis shows that this scheme is secure and efficient and does not rely on trusted center.