Multi-search supporting design method for encrypted database middleware

Abstract

The invention discloses a multi-search supporting design method for an encrypted database middleware, and aims at encrypting data and anonymizing a data relation mode so as to protect the safety of data stored in a relation database under a cloud environment with database outsourcing service, as well as preventing data privacy from being pried and disclosed by a cloud service supplier on the premise that the availability of the data is ensured. The method mainly comprises the steps of enabling correspondence of the data encrypting storing type and search type; building a local data dictionary; rewriting SQL statements. The method can support encrypted data storage by a plurality of modes, anonymizing of the relation mode, and various modes of searching the encrypted data dictionary and encrypted data. The method is easy to carry out, high in safety and high in efficiency, supports equivalent search, range search, aggregate search, Top-k search and other search modes, is free of modification on database software, and widely supports various commercial relation databases.

Description

technical field [0001] The invention relates to a design method of a ciphertext database middleware supporting multiple queries, and belongs to the technical field of information security. Background technique [0002] As a new network computing model, cloud computing provides users with on-demand IT services (ie computing, storage and applications, etc.) in a more economical way than traditional IT services. Because the development concept of cloud computing is in line with the current general trend of low-carbon economy and green computing, it has been vigorously advocated and promoted by governments and enterprises all over the world, bringing about tremendous changes in the computing and business fields. [0003] However, in the cloud computing services that have been implemented, privacy security issues have always been worrying, and have become one of the main factors hindering the development and promotion of cloud computing. The user's private data includes informat...

AI Technical Summary

Problems solved by technology

[0003] However, in the cloud computing services that have been implemented, privacy and security issues have always been worrying, and have become one of the main factors hindering the development and promotion of cloud computing.

[0006] A database ciphertext query method (patent number: 2005101309070, application date: 2006.06.14, publication number: CN1786963), although it realizes ciphertext data query without changing the original database, it can only support equivalent The ciphertext query does not support multiple query methods (such as range query)

Patent "A method for protecting personal privacy data at the server side in a network information system" (patent number: 2014101180124, application date: 2014.09.03, publication number: CN103973668A), although precise query, similar query, Range query, etc., but cannot support the query of the aggregate function of the database, and the indexing process is complicated, and the cost of time and space is very high

None of the above patents support the anonymization of the data relational model, which will cause the disclosure of the meaning of the data

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