摘要
基于属性的签名允许签名者拥有一系列属性信息,在不泄露具体身份信息的前提下对消息进行签名,该签名随后可被验证满足特定的访问控制结构。目前的基于LSSS矩阵的属性签名方案虽然访问结构灵活,但签名的计算代价较高。为了减少签名的计算量,文中对基于LSSS矩阵的属性签名方案进行改进,并结合外包计算思想,提出了云计算环境下签名长度和签名者签名计算量均为常数的基于属性高效外包签名方案。该方案为云服务提供商提供外包密钥,以便将签名过程的大部分模幂计算外包给云服务提供商,签名者在收到云服务提供商的计算结果以后,只需进行少量计算即可对消息进行签名。安全性分析表明,该方案具有签名者隐私性,且基于计算Diffie-Hellman问题假设,在随机预言模型下具有不可伪造性。
The attribute based signature allows the signer to have a series of attribute information and signatures on the premise,so that the specific identity information is not leaked,and the signature can then be verified to satisfy a specific access control structure. Although the current attribute based signature scheme based on LSSS matrix is flexible in access structure,the computation overhead of the signature is higher. To reduce the computational complexity of the signature,this paper improves the attribute based signature scheme based on the LSSS matrix and combines the idea of outsourcing computing. An attribute based outsourcing signature scheme is first proposed for the constant signature size and computation overhead in the cloud computing environment. The scheme provides the outsourcing key for the cloud service provider,so as to outsource most of module exponentiation computation of the signature process to cloud service providers. After receiving the calculation results of the cloud service provider,the signer needs only a small amount of calculation to sign the message. The security analysis shows that the scheme is signer＇s privacy,and not forgery on the random oracle model.
作者
吴章淋
陈燕俐
陈梦书
WU Zhanglin;CHEN Yanli;CHEN Mengshu(School of Computer Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《南京邮电大学学报（自然科学版）》
北大核心
2018年第5期100-110,共11页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(61572263
61272084)资助项目
