Broadcast encryption scheme enables a sender distribute the confidential content to a certain set of intended recipients. It has been applied in cloud computing, TV broadcasts, and many other scenarios. Inner product broadcast encryption takes merits of both broadcast encryption and inner product encryption. However, it is crucial to reduce the computation cost and to take the recipient’s privacy into consideration in the inner product broadcast encryption scheme. In order to address these problems, we focus on constructing a secure and practical inner product broadcast encryption scheme in this paper. First, we build an anonymous certificate-based inner product broadcast encryption scheme. Especially, we give the concrete construction and security analysis. Second, compared with the existing inner product broadcast encryption schemes, the proposed scheme has an advantage of anonymity. Security proofs show that the proposed scheme achieves confidentiality and anonymity against adaptive chosen-ciphertext attacks. Finally, we implement the proposed anonymous inner product broadcast encryption scheme and evaluate its performance. Test results show that the proposed scheme supports faster decryption operations and has higher efficiency.

中文翻译：

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基于匿名证书的内积广播加密

广播加密方案使发送者能够将机密内容分发给特定的一组预期接收者。已应用于云计算、电视广播等诸多场景。内积广播加密兼有广播加密和内积加密的优点。然而，在内积广播加密方案中，降低计算成本和考虑接收者的隐私是至关重要的。为了解决这些问题，本文重点构建了一个安全实用的内积广播加密方案。首先，我们构建了一个基于匿名证书的内积广播加密方案。特别是，我们给出了具体的构造和安全性分析。二、与现有的内积广播加密方案相比，提议的方案具有匿名优势。安全证明表明，所提出的方案实现了针对自适应选择密文攻击的机密性和匿名性。最后，我们实现了所提出的匿名内积广播加密方案并评估其性能。测试结果表明，所提出的方案支持更快的解密操作并具有更高的效率。