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How to encrypt master key in SQL Server?
ADD ENCRYPTION BY SERVICE MASTER KEY causes a copy of the master key to be encrypted using the service master key and stored in both the current database and in master. Requires CONTROL permission on the database. If the database master key has been encrypted with a password, knowledge of that password is also required.
Where is the database master key stored in SQL Server?
When a database is first attached or restored to a new instance of SQL Server, a copy of the database master key (encrypted by the service master key) is not yet stored in the server. You must use the OPEN MASTER KEY statement to decrypt the database master key (DMK).
When to open Transact-SQL service master key?
To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. The password with which the Database Master Key was encrypted. If the database master key was encrypted with the service master key, it will be automatically opened when it is needed for decryption or encryption.
How does drop encryption by service master key work?
The DROP ENCRYPTION BY SERVICE MASTER KEY option removes the encryption of the database master key by the service master key. ADD ENCRYPTION BY SERVICE MASTER KEY causes a copy of the master key to be encrypted using the service master key and stored in both the current database and in master.
How is the service master key encrypted?
The service master key is encrypted using the local machine key or the Windows Data Protection API. This API uses a key that is derived from the Windows credentials of the SQL Server service account. SQL Server 2012 (11.x) uses the AES encryption algorithm to protect the service master key (SMK) and the database master key (DMK).
Where can I find the database master key?
Information about the database master key is visible in the sys.symmetric_keys catalog view. For SQL Server and Parallel Data Warehouse, the Master Key is typically protected by the Service Master Key and at least one password. In case of the database being physically moved to a different server (log shipping, restoring backup, etc.),…
Do you need a service master key for SQL Server?
Do not use. Use SQL Server Configuration Manager instead. The service master key is automatically generated the first time it is needed to encrypt a linked server password, credential, or database master key. The service master key is encrypted using the local machine key or the Windows Data Protection API.