摘要
已有的(t,n)门限代理签名方案,只能实现在同一级门限下的代理签名。本文利用离散对数和大数分解问题的困难性,提出一种多级门限代理签名方案。该方案能在各代理签名人持有密钥不变的情况下,根据待签名文件的安全性要求,调整门限值,实现在多级门限下的代理签名。该方案具有安全性高,灵活性强的特点。
In a threshold proxy signature scheme, the proxy signature can only be generated in the same level threshold. A multi--level threshold proxy signature scheme based on the intractability of the discrete logarithm and integer factorization is proposed. In the scheme, each proxy signer keeps only one proxy key, the proxy signatures are generated in the multiple level thresholds according to the security level of the message. The scheme has advantage of higher secure reliability and flexibility.
出处
《北京电子科技学院学报》
2011年第4期42-45,共4页
Journal of Beijing Electronic Science And Technology Institute
关键词
门限代理签名
多级门限
代理签名
合谋攻击
threshold proxy signature
multi-- level threshold
proxy signature
conspiracy attack
