摘要
该文基于q-SDH假设和判定线性DLDH假设,通过将时间参数t加入签名钥实现成员的撤销和更新。群成员可以错过多次的更新,签名时群成员下载最新的更新值即可。该文的签名允许攻击者在攻击完全匿名时提问打开预言机,群管理员可有效撤销群成员,签名长度为2215bits。
Based on the assumption of q-SDH and linear DLDH, this paper realizes the revocation of the members, and group members own the private credential by introducing time parameter"t". Even if updates are missed, just download the latest num ber when signing, case group public key never changes that is much conveniences. The scheme allows adversary querying open oracle when trying to attack the anonymity notion. The group manager can revoke the members effectively. The length of signa ture is 2215 bits.
出处
《电脑知识与技术》
2013年第9X期6132-6134,共3页
Computer Knowledge and Technology
基金
南通市科技计划项目(BK2013050
BK2012026)
江苏省高校自然科学研究项目(12KJB520015)
