基于属性的广义签密方案

发布时间：2018-05-20 12:52

本文选题：签密 + 广义签密　；参考：《计算机研究与发展》2014年S2期

【摘要】：现有签密方案不能向模糊身份的接收方发送数据、且对数据的共享访问控制不够精细,而基于属性的签密也无法自适应地实现机密性、认证性以及机密且认证等不同的安全需求.在离散对数和随机预言机模型下提出了一种基于属性的广义签密方案.通过引入属性集,使数据可以凭用户的属性为依据进行分发;通过区分通信双方所持有的密钥,可以提供单独的机密性、认证性和复合的机密性和认证性功能.在DBDH假设下的安全性分析表明方案在选择密文攻击下达到了不可区分性,在CDH假设下的安全性分析表明方案在选择消息攻击下达到了不可伪造性.与其他类似方案相比,该方案在用户的属性个数增加时,密文长度和密钥长度不会线性增长,效率更高.
[Abstract]:The existing signcryption scheme can not send data to the receiver of fuzzy identity, and the shared access control of the data is not precise enough, and the signcryption based on attributes can not realize the confidentiality adaptively. Different security requirements such as authentication and confidentiality and authentication. A generalized signcryption scheme based on attributes is proposed under discrete logarithm and random oracle models. By introducing the attribute set, the data can be distributed according to the user's attributes, and by distinguishing the key held by the two parties, the separate confidentiality, authentication, composite confidentiality and authentication function can be provided. The security analysis under the DBDH hypothesis shows that the scheme is indistinguishable under the attack of selected ciphertext, and the security analysis under the assumption of CDH shows that the scheme is unforgeable under the attack of selected message. Compared with other similar schemes, the ciphertext length and key length do not increase linearly and are more efficient when the number of attributes is increased.
【作者单位】：西北大学信息科学与技术学院;武警工程大学电子技术系;
【基金】：国家自然科学基金项目(61103231,61272492) 中国博士后科学基金资助项目(2014M562445)
【分类号】：TN918.4

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