改进的无证书广义指定验证者聚合签名方案

发布时间：2018-11-26 18:03

【摘要】：无证书广义指定验证者聚合签名(CTL-ASWUDV)能有效解决签名者的隐私保护问题。针对最近指出的张玉磊等学者的CTL-ASWUDV方案构造无效且不满足两类敌手攻击的问题,提出了一个改进的CTL-ASWUDV方案(CTL-ASWUDV-1)。该方案在保持了原方案中聚合签名长度和双线性配对数固定的优点的同时,有效克服了两类敌手的攻击。进一步提出了一个更加高效的CTL-ASWUDV方案(CTL-ASWUDV-2)。在随机预言机模型下,证明该方案的安全性可规约为CDH问题。同时,该方案与目前已有的同类方案相比具有如下优势:单个签名和聚合签名无需双线性配对运算,而且聚合签名验证所需的双线性配对数量与签名人数无关,与单个签名验证数量相当,都是1个配对运算;聚合签名长度和指定验证者签名长度与签名人数无关,与单个签名长度相当,都是固定的1个元素,大大节省了网络带宽。
[Abstract]:Certificate-free generalized designated verifier aggregate signature (CTL-ASWUDV) can effectively solve the privacy protection problem of the signer. Aiming at the recently pointed out problem that the CTL-ASWUDV scheme of Zhang Yulei and other scholars is invalid and does not satisfy two kinds of enemy attacks, an improved CTL-ASWUDV scheme (CTL-ASWUDV-1) is proposed. The scheme not only preserves the advantages of fixed aggregate signature length and bilinear pairing number in the original scheme, but also effectively overcomes the attacks of two kinds of adversaries. Furthermore, a more efficient CTL-ASWUDV scheme (CTL-ASWUDV-2) is proposed. In the random oracle model, it is proved that the security of the scheme can be reduced to a CDH problem. At the same time, compared with the existing schemes, the scheme has the following advantages: single signature and aggregate signature do not require bilinear pairing operation, and the number of bilinear pairing required for verification of aggregate signature is independent of the number of signatures. The number of verification is equal to that of a single signature, which is a pairing operation. The length of aggregate signature and the length of designated verifier signature are independent of the number of signatures and equal to the length of a single signature. They are all fixed elements, which greatly save the network bandwidth.
【作者单位】：上海第二工业大学计算机与信息工程学院;广西大学计算机与电子信息学院;
【基金】：上海市教育委员会科研创新基金重点项目(14ZZ167) 国家自然科学基金资助项目(61103213,61272036,61672022) 广西自然科学基金项目(2014GXNSFAA11838-2) 上海第二工业大学校级重点学科计算机科学与技术(XXKZD1604)资助
【分类号】：TN918.4

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