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Witness-based searchable encryption with optimal overhead for cloud-edge computing

机译:基于见证的可搜索加密,具有用于云边缘计算的最佳开销

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The security and utilization of cloud storage are well-known open issues. Public key encryption with keyword search (PEKS) provides an important primitive to discuss applications in the field of cloud storage, where the receiver can use the trapdoor of the keyword to search. However, the internal attack derived by the cloud server is an inherent issue of PEKS. There are two breakthroughs, so-called authenticated PEKS (APKES) and witness-based searchable encryption (WBSE), to tackle this issue by modifying framework of PEKS. The existing schemes of APEKS and WBSE can offer security against the internal attacks, but they require the trapdoor size is proportional to cn where n is the total number of senders, and c is the constant size of the ciphertext or proportion to the security parameter. In this paper, we propose a new WBSE scheme with constant overhead as long as n is bounded. We analyze the security of our scheme based on homomorphic encryption and digital signature. Finally, we provide implementations to show the effectiveness on the cloud-edge model. (C) 2019 Elsevier B.V. All rights reserved.
机译:云存储的安全性和利用率是众所周知的未解决问题。带关键字搜索的公钥加密(PEKS)提供了一个重要的原语,用于讨论云存储领域中的应用程序,接收者可以使用该关键字的活板门进行搜索。但是,云服务器派生的内部攻击是PEKS固有的问题。通过修改PEKS的框架来解决此问题,有两个突破,即所谓的认证PEKS(APKES)和基于见证人的可搜索加密(WBSE)。现有的APEKS和WBSE方案可以提供针对内部攻击的安全性,但是它们要求陷门的大小与cn成正比,其中n是发件人的总数,c是密文的恒定大小或与安全性参数成比例。在本文中,我们提出了一种新的具有固定开销的WBSE方案,只要n是有界的。我们基于同态加密和数字签名分析我们的方案的安全性。最后,我们提供了一些实施方案来展示在云边缘模型上的有效性。 (C)2019 Elsevier B.V.保留所有权利。

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