A Design Method of Ciphertext Database Middleware Supporting Multiple Queries

Abstract

The invention discloses a design method of a ciphertext database middleware supporting multi-query. The method encrypts the data and anonymizes the data relational schema, so as to realize storage of relational databases in a cloud environment with database outsourcing services. Data security protection, on the premise of ensuring data availability, prevents cloud service providers from snooping and leaking data privacy. The method described in the present invention mainly includes: correspondence between data encryption storage type and query type, establishment of local data dictionary, rewriting of SQL statement, and the like. The present invention can support: various ways of ciphertext data storage, anonymization of relational patterns, ciphertext data dictionary, and multiple ways of querying ciphertext data. This method is easy to implement, has high security and high efficiency, supports multiple query methods such as equivalent query, range query, aggregate query, Top-k query, and does not require any modification of the database software, and can widely support various commercial relational 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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