How to encrypt MySQL database tables?

MySQL database tables can be encrypted using the following methods:

1. Encrypting at the database level: You can utilize MySQL’s built-in encryption functions like AES_ENCRYPT and AES_DECRYPT to encrypt data before storing it in the database. To decrypt, simply call the AES_DECRYPT function.
2. Encryption at the field level: you can define the field that needs encryption as a VARBINARY type in the table definition, and then encrypt and decrypt the data in the application when inserting and retrieving data.
3. SSL/TLS encryption: MySQL supports connecting encryption through the SSL/TLS protocol. By establishing a secure SSL connection between the MySQL server and client, data transmission can be protected.
4. File-level encryption refers to encrypting database files using operating system-level file encryption features such as BitLocker or EFS.

It is important to note that encryption operations on database tables should be performed in the application in order to ensure the security and accuracy of the data. Additionally, encryption operations may have a certain impact on the performance of the database, so performance testing and optimization are necessary.