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Proxy Re-Encryption: Analysis of constructions and its application to secure access delegation

机译:代理重新加密:结构分析及其在安全访问委派中的应用

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This paper analyzes the secure access delegation problem, which occurs naturally in the cloud, and postulate that Proxy Re-Encryption is a feasible cryptographic solution, both from the functional and efficiency perspectives. Proxy re-encryption is a special type of public-key encryption that permits a proxy to transform ciphertexts from one public key to another, without the proxy being able to learn any information about the original message. Thus, it serves as a means for delegating decryption rights, opening up many possible applications that require of delegated access to encrypted data. In particular, sharing information in the cloud is a prime example. In this paper, we review the main proxy re-encryption schemes so far, and provide a detailed analysis of their characteristics. Additionally, we also study the efficiency of selected schemes, both theoretically and empirically, based on our own implementation. Finally, we discuss some applications of proxy re encryption, with a focus on secure access delegation in the cloud.
机译:本文分析了自然存在于云中的安全访问委派问题,并从功能和效率角度出发,都假定代理重新加密是可行的密码解决方案。代理重新加密是一种特殊类型的公钥加密,它允许代理将密文从一个公钥转换为另一个公钥,而代理不能够学习有关原始消息的任何信息。因此,它用作委派解密权限,打开许多可能需要委托访问加密数据的应用程序的手段。特别是,在云中共享信息就是一个很好的例子。在本文中,我们回顾了到目前为止的主要代理重新加密方案,并提供了其特征的详细分析。此外,我们还将根据自己的实施方式,从理论上和经验上研究所选方案的效率。最后,我们讨论代理重新加密的一些应用,重点是云中的安全访问委派。

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