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Multi-user search on the encrypted multimedia database: lattice-based searchable encryption scheme with time-controlled proxy re-encryption

机译：加密多媒体数据库的多用户搜索：基于格子的可搜索加密方案，具有时间控制的代理重新加密

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摘要

Multimedia cloud storage which saves the huge storage overhead of local devices has attracted considerable attention. However, due to the lack of physical control of data, the privacy protection of data on the multimedia cloud has become one of the main concerns of users. Public-key encryption with keywords search (PEKS) is a technique that can keep the privacy and searchability of data in the cloud. In this paper, we present a PEKS with time-controlled proxy re-encryption model which allows the data owner to delegate the access right of the encrypted multimedia database to other users, to achieve the time-controlled multi-user search. Furthermore, it is designed to resist keywords guessing attack and support conjunctive keywords search. Compared with previous works which require a time server to generate a time seal for the generation of the search token, this model embeds the time information of accessing the encrypted database into public and secret key pairs of data users, which saves the managing overhead and reduces the security risks resulting from an extra server. In addition, most existing PEKS schemes were constructed based on the hardness of classical mathematical problems which can be broken by quantum computers. To address this issue, a lattice-based PEKS scheme based on the above model is proposed, which can be considered as the candidate for protecting multimedia data security in the quantum era.
机译：节省了本地设备的巨大存储开销的多媒体云存储引起了相当大的关注。但是，由于缺乏对数据的物理控制，多媒体云上的数据隐私保护已成为用户的主要问题之一。具有关键字搜索（PEKS）的公钥加密是一种可以保留云中数据的隐私和可搜索的技术。在本文中，我们呈现了一个具有时间控制代理重新加密模型的PEK，其允许数据所有者将加密的多媒体数据库的访问权委派给其他用户，以实现时间控制的多用户搜索。此外，它旨在抵抗猜测攻击和支持联合关键字搜索的关键字。与以前的作品相比，需要时间服务器生成用于生成搜索令牌的时间密封，该模型将访问加密数据库的时间信息嵌入到公共和密钥对数据用户的公共和密钥密钥对中，该数据用户节省了管理开销并减少了额外服务器产生的安全风险。此外，基于可以由量子计算机破坏的经典数学问题的硬度来构建大多数现有的PEKS方案。为了解决这个问题，提出了一种基于上述模型的基于格子的PEKS方案，可以被认为是保护量子时代中的多媒体数据安全的候选者。

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