A Generic Construction of Integrated Secure-Channel Free PEKS and PKE
A Generic Construction of Integrated Secure-Channel Free PEKS and PKE
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DOI：
10.1007/978-3-319-99807-7_5
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
Tatsuya Suzuki;K. Emura;T. Ohigashi
中科院分区：
文献类型：
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作者：
Tatsuya Suzuki;K. Emura;T. Ohigashi
为了提供对加密数据的搜索功能，具有关键字搜索的公钥加密（PEKS）已被广泛认可。在实际使用中，PEKS方案应该与PKE方案一起使用，因为PEKS本身不支持数据的解密。由于PEKS密文和PKE密文的简单组合并不提供CCA安全性，因此已经进行了多次尝试以联合CCA方式集成PEKS和PKE（简称PEKS/PKE）。在本文中，我们进一步扩展这些工作，通过集成安全通道自由PEKS（SCF PEKS）和PKE，我们称之为SCF PEKS/PKE，不需要安全通道发送陷门。本文以联合CCA的方式给出了SCF-PEKS/PKE的形式化安全定义，并基于匿名身份加密、基于标签加密和一次签名提出了一种通用的SCF-PEKS/PKE构造方法。我们还加强了目前的一致性定义，根据安全信道自由的性质，并表明，我们的建设是强一致的，如果底层的IBE提供无限制的强碰撞自由，这是本文定义的。最后，我们证明了这样的IBE方案可以通过使用Abdalla等人的变换来构造（TCC 2010/JoC 2018）。
To provide a search functionality for encrypted data, public key encryption with keyword search (PEKS) has been widely recognized. In actual usage, a PEKS scheme should be employed with a PKE scheme since PEKS itself does not support the decryption of data. Since a naive composition of a PEKS ciphertext and a PKE ciphertext does not provide CCA security, several attempts have been made to integrate PEKS and PKE in a joint CCA manner (PEKS/PKE for short). In this paper, we further extend these works by integrating secure-channel free PEKS (SCF-PEKS) and PKE, which we call SCF-PEKS/PKE, where no secure channel is required to send trapdoors. We give a formal security definition of SCF-PEKS/PKE in a joint CCA manner, and propose a generic construction of SCF-PEKS/PKE based on anonymous identity-based encryption, tag-based encryption, and one-time signature. We also strengthen the current consistency definition according to the secure-channel free property, and show that our construction is strongly consistent if the underlying IBE provides unrestricted strong collision-freeness which is defined in this paper. Finally, we show that such an IBE scheme can be constructed by employing the Abdalla et al. transformations (TCC 2010/JoC 2018).