计算机科学 ›› 2015, Vol. 42 ›› Issue (6): 171-174.doi: 10.11896/j.issn.1002-137X.2015.06.037
杨坤伟,李顺东
YANG Kun-wei and LI Shun-dong
摘要： 大多数基于身份的加密方案(Identity-based Encryption,IBE)不具备接收者匿名性。提出了一个匿名IBE方案,方案基于判定性双线性DH假设(Decisional Bilinear Diffie-Hellman,DBDH),对于选择明文攻击(Chosen Plaintext Attack,CPA)是安全的。最后,给出了方案正确性证明、匿名性分析以及安全性证明。方案的优势是加密过程不需要对运算、接收者匿名等。与Gentry的方案相比,本方案所基于的困难性问题更常见,弥补了DBDH假设下匿名IBE的空缺。
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