Relational database encryption method and encrypted database query method

Abstract

The invention discloses a relational database encryption method and an encrypted database query method, and the method comprises the steps of building a data encryption scheme in a safety agent; enabling a user to select the encryption security level of to-be-encrypted plaintext data at a client and then to send the to-be-encrypted plaintext data to be transmitted to the safety agent; and enablingthe safety agent to encrypt the plaintext data to be encrypted according to the data encryption scheme and the encryption security level to obtain ciphertext data, sendiing the ciphertext data to a server, and storing a key in the security agent. By means of the mode, the encryption time can be greatly shortened, the data encryption efficiency and the storage space utilization rate are improved,the data safety is guaranteed, a safety agent mechanism is introduced, a safety agent only needs to decrypt a query result once during data query, decryption does not need to be conducted at a serverside, and the query efficiency and the data security are improved.

Description

technical field [0001] The invention relates to the field of data privacy protection, in particular to a relational database encryption method and the encrypted database query method. Background technique [0002] With the development of database technology and the surge in data volume, it becomes increasingly unrealistic to store all data locally. Today, with the rapid popularization of cloud computing services, more and more important data are stored in cloud databases. At this time, database security becomes particularly important. The threats to database security mainly come from two aspects. On the one hand, external attackers use system vulnerabilities to obtain unauthorized access to the database, thereby stealing private data; on the other hand, there are curious or malicious database administrators with legitimate access rights. The possibility of snooping and leaking private data. [0003] A common method to ensure the security of private data in the database is ...

AI Technical Summary

Problems solved by technology

[0010] The technical problem mainly solved by the present invention is to provide a relational database encryption method and the encrypted database query method, which can solve the security risks caused by the excessive storage space on the database side, the use of searchable encryption algorithms to build indexes, and the query process. It takes a long time and low efficiency to decrypt the query results

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