2/24/2024 0 Comments Create column sqlIt is recommended you use tools, such as SQL Server Management Studio (SSMS) or PowerShell to manage column encryption keys. The encryption algorithms, Always Encrypted supports, require the plaintext value to have 256 bits. An Always Encrypted enabled driver in a client application that doesn't have access to the new master key, will use the column encryption key value encrypted with the old column master key to access sensitive data. This rotation allows you to ensure client applications can access data encrypted with the column encryption key, while the new column master key is made available to client applications. When you need to rotate the key, add a new value of the column encryption key, encrypted with the new column master key. At times, you need to rotate a column master key to replace the current column master key with the new column master key. Typically, a column encryption key is created with just one encrypted value. You can also use the ALTER COLUMN ENCRYPTION KEY statement to remove a value. You can use the ALTER COLUMN ENCRYPTION KEY (Transact-SQL) to add a second value later. The CREATE COLUMN ENCRYPTION KEY statement must include at least one or two values. Doing so will compromise the benefit of this feature. Never pass plaintext column encryption key values in this statement. The encrypted column encryption key value BLOB. The algorithm for the system providers must be RSA_OAEP. Name of the encryption algorithm used to encrypt the value of the column encryption key. Specifies the name of the custom CMK used for encrypting the column encryption key. Is the name by which the column encryption key will be known in the database. Transact-SQL syntax conventions Syntax CREATE COLUMN ENCRYPTION KEY key_nameĬOLUMN_MASTER_KEY = column_master_key_name, Each value is encrypted using a column master key. A column encryption key metadata object contains one or two encrypted values of a column encryption key that is used to encrypt data in a column. SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed InstanceĬreates a column encryption key metadata object for Always Encrypted or Always Encrypted with secure enclaves.
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