摘要
在基于身份的代理重签名方案的基础上,提出一种无随机预言机的基于身份的双向门限代理重签名方案。在标准模型下对该方案进行安全性证明,表明该方案是健壮的,能抵抗适应性选择身份和消息攻击。系统公开参数少于标准模型下其他基于身份的门限代理重签名方案,且方案的安全性紧归约到q-SDH问题的安全性。
Based on ID-based proxy re-signature,an ID-based bidirectional threshold proxy re-signature scheme without random oracles is presented,and its security in the standard model is proved.The analysis result shows that it is robust and secure against existential forgery under the adaptive chosen identity and message attacks.The length of public parameters of the scheme is shorter than that of previously known ID-based bidirectional threshold proxy re-signature scheme in the standard model,and the security of the scheme is tightly reduced to the security of the q-Strong Diffie-Hellman（q-SDH） problem.
出处
《计算机工程》
CAS
CSCD
北大核心
2011年第7期125-126,129,共3页
Computer Engineering
基金
甘肃省自然科学基金资助项目(0710RJZA072)
关键词
门限代理重签名
基于身份
可证安全
标准模型
q-SDH问题
threshold proxy re-signature
ID-based
provably secure
standard model
q-Strong Diffie-Hellman（q-SDH） problem
