To encrypt columns in your database, use the ENCRYPT function. The ENCRYPT function uses the same AES strong encryption algorithm that is used for database encryption to encrypt values that are passed to it.
Encrypted data can be decrypted with the DECRYPT function. You must use the same key that was specified in the ENCRYPT function. Both of these functions return LONG BINARY values. If you require a different data type, you can use the CAST function to convert the value to the required data type.
The ENCRYPT and DECRYPT functions also support raw encryption. You can encrypt data inside the database server into a format that can be exported and decrypted outside of the server.
If database users need to access the data in decrypted form, but you do not want them to have access to the encryption key, you can create a view that uses the DECRYPT function. This allows users to access the decrypted data without knowing the encryption key. If you create a view or stored procedure that uses the table, you can use the SET HIDDEN parameter of the ALTER VIEW and ALTER PROCEDURE statements to ensure that users cannot access the encryption key by looking at the view or procedure definition.
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