Searchable encryption method and system suitable for database management system

Abstract

The invention belongs to the technical field of searchable encryption, and discloses a searchable encryption method and system suitable for a database management system. The searchable encryption method suitable for the database management system comprises the steps that: the system is initialized; parameter processing and key generation are performed; the file is encrypted by the user u, and keywords and security indexes are generated; a query process is performed; and the user decrypts the ciphertext to obtain the required document. According to the searchable encryption method suitable for the database management system, an index suitable for the database management system can be generated, and the index is called as searchable symmetric encryption based on a variable tag of the encryption index and suitable for the database management system. The present invention constructs an index by using a portion of an output value of a deterministic encryption function, and provides a self-information control mechanism to stepwise publish the portion value. In addition, the invention also provides a certain security function to perform security management on the information. Compared with a general scheme, the encryption security and the search efficiency of searchable encryption are improved, and the method is more suitable for a database management system.

Description

technical field [0001] The invention belongs to the technical field of searchable encryption, in particular to a searchable encryption method and system suitable for database management systems. Background technique [0002] At present, with the increasing popularity of people storing data in the cloud, while people store more and more data in the cloud, the security and reliability of their data has received unprecedented attention. Although the use of encryption technology to encrypt files and store them in the cloud can effectively ensure the confidentiality of data, but in this way, the user's data loses a lot of operability. For example, searching for files only requires matching keywords directly, but this cannot be done for encrypted data. Therefore, in order to provide a ciphertext search method, a large number of searchable encryption methods have been conceived. However, the searchable encryption methods suitable for database management systems are mainly based on...

AI Technical Summary

Problems solved by technology

An index that is too simple may increase the time cost of searching, while an index that is too complex is difficult to build and operate, resulting in reduced usability

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