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Efficient Attribute-Based Searchable Encryption on Cloud Storage

机译：基于高效的基于属性的可搜索加密云存储

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摘要

Cloud service is very popular for its computing and storage capacity at lower cost. More and more data are being moved to the cloud to reduce storage cost. On the other hand, since the cloud is not fully trustable, in order to protect data privacy against third-parties and even the cloud server, they are usually encrypted by cryptology technology before uploading. However, many operations, such as searching, are hard to perform on encrypted data. To solve this problem, searchable encryption has emerged. Searchable encryption in multi-user setting is much less efficient than in single-user setting. In order to address this problem, we propose a multi-owner to multi-user searchable encryption scheme based on attribute-based encryption. Our scheme keeps data secure in the cloud even against the cloud server. It allows users with appropriate authorizations to perform search operations on encrypted data. In addition, search tokens are generated by users instead of data owners. We prove that token privacy and index privacy are well protected in our scheme. The cloud server and illegimate users are not able to get any useful information about search tokens and ciphertexts. Ciphertexts of our scheme are constant-size, which reduce the time-complexity and bandwidth overhead of our scheme.
机译：云服务以较低的成本为其计算和存储容量非常流行。越来越多的数据被移动到云以降低储存成本。另一方面，由于云不完全可信，以保护对第三方甚至云服务器的数据隐私，因此在上传前通常由密码技术加密。然而，许多操作（例如搜索）很难在加密数据上执行。要解决此问题，因此可以出现搜索可搜索的加密。可搜索的多用户设置中的加密远低于单用户设置的效率远得多。为了解决这个问题，我们向基于属性的加密提出了一个多用户可搜索的加密方案。我们的计划即使在云服务器上也会在云中保持数据。它允许用户使用适当的授权来对加密数据执行搜索操作。此外，搜索令牌由用户而不是数据所有者生成。我们证明了令牌隐私和索引隐私在我们的计划中受到很好的保护。云服务器和非法用户无法获取有关搜索令牌和密文的任何有用信息。我们方案的密文是恒定大小的，这减少了我们方案的时间复杂性和带宽开销。

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