排序方式: 共有111条查询结果,搜索用时 151 毫秒
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目前基于身份的部分盲签名方案或者安全性不高,或者效率较低。针对这些方案的缺陷,通过密码学分析和算法结构设计,提出了一个新的基于身份的无可信私钥生成中心(Private Key Generator,PKG)的、只有一个对运算的部分盲签名方案。证明了方案的强盲性,证明了该方案可以抵抗适应性选择消息和身份攻击,可以抵抗不可信PKG的攻击,其安全性依赖于强l-SDHP难题。比较了方案和其他类似方案的效率。 相似文献
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高效无可信PKG的新型盲签名方案* 总被引:1,自引:1,他引:0
针对目前基于身份的盲签名方案或者安全性不高,或者效率较低的缺陷,通过密码学分析和算法结构设计,首先提出了一个基于身份的无可信私钥生成中心(PKG)、只有一个对运算的签名方案;然后基于该方案提出了一个基于身份的无可信PKG、只有一个对运算的盲签名方案,并证明了方案的强盲性和不可伪造性,比较了方案与其他类似方案的效率。该方案可以抵抗适应性选择消息和身份攻击,抵抗不可信PKG的攻击,其安全性依赖于强l-SDHP难题。 相似文献
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本文把矢量空间秘密共享和代理签名结合起来,构建了一种基于访问结构的门限代理签名方案。任何参与者的授权子集都能很容易地产生代理签名,而非参与者不可能产生有效的代理签名,接收者可以通过验证方法验证个体代理签名和多重代理签名的合法性,而且能保证任何参与者都能检测出错误的子秘密,能抵御各种可能的攻击。 相似文献
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Strongly unforgeable threshold multi‐proxy multi‐signature scheme with different proxy groups 下载免费PDF全文
In the majority of threshold multi‐proxy multi‐signature (TMPMS) schemes, only one proxy group is authorized to sign on behalf of all the original members. However, the original signers in various practical applications are often from different organizations. Each original signer should be able to designate a proxy group in his own organization; thus, each original signer could have distinct proxy members. However, this practical requirement of TMPMS schemes is seldom considered. To satisfy this requirement, we propose a new TMPMS scheme in which each original member can designate a proxy group in his own organization. Moreover, the threshold value of each proxy group is unique. We develop a security model to prove the high security and strong unforgeability of the proposed scheme. We analyze the security of our scheme based on the four types of adversaries tested in the security model. Compared with previous schemes, the new scheme offers higher security and superior computational efficiency. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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