Relational database encryption method and encrypted database query method

• Main Authors: DAI MENGXUAN, ZHAO JIALE, ZHAO CONGJUN, CHEN HUYUAN, MA YONG, CAO YUANLONG
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

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 efficie