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Anonymous HIBE with short ciphertexts: full security in prime order groups

机译:具有短密文的匿名HIBE:素数阶组中的完全安全性

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摘要

Anonymous hierarchical identity-based encryption (HIBE) is an extension of identity-based encryption (IBE), and it provides not only a message hiding property but also an identity hiding property. Anonymous HIBE schemes can be applicable to anonymous communication systems and public key encryption systems with keyword searching. However, previous anonymous HIBE schemes have some disadvantages that the security was proven in the weaker model, the size of ciphertexts is not short, or the construction was based on composite order bilinear groups. In this paper, we propose the first efficient anonymous HIBE scheme with short ciphertexts in prime order (asymmetric) bilinear groups, and prove its security in the full model with an efficient reduction. To achieve this, we use the dual system encryption methodology of Waters. We also present the benchmark results of our scheme by measuring the performance of our implementation.
机译:匿名分层基于身份的加密(HIBE)是基于身份的加密(IBE)的扩展,它不仅提供了消息隐藏属性,而且还提供了身份隐藏属性。匿名HIBE方案可应用于带有关键字搜索的匿名通信系统和公共密钥加密系统。但是,以前的匿名HIBE方案具有以下缺点:在较弱的模型中证明了安全性,密文的大小不短,或者构造基于复合阶双线性组。在本文中,我们提出了第一个在素数阶(不对称)双线性组中具有短密文的高效匿名匿名HIBE方案,并通过有效的归约证明了其在完整模型中的安全性。为此,我们使用沃特世的双重系统加密方法。我们还通过衡量实施的绩效来介绍我们的计划的基准结果。

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