![]() ![]() Requires CONTROL permission on the database. The DROP ENCRYPTION BY SERVICE MASTER KEY option removes the encryption of the database master key by the service master key.ĪDD 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. Information that is encrypted only by an irretrievable key will be lost. Use the FORCE option only if the master key is irretrievable or if decryption fails. If the master key cannot be opened, use the RESTORE MASTER KEY statement to restore the master key from a backup. When the FORCE option is used, key regeneration will continue even if the master key is unavailable or the server cannot decrypt all the encrypted private keys. For more information about regenerating the SMK, see ALTER SERVICE MASTER KEY. After upgrading an instance of the Database Engine to SQL Server 2012 (11.x) the SMK and DMK should be regenerated in order to upgrade the master keys to AES. AES is a newer encryption algorithm than 3DES used in earlier versions. ![]() SQL Server 2012 (11.x) uses the AES encryption algorithm to protect the service master key (SMK) and the database master key (DMK). This resource-intensive operation should be scheduled during a period of low demand, unless the master key has been compromised. The keys are first decrypted with the old master key, and then encrypted with the new master key. The REGENERATE option re-creates the database master key and all the keys it protects. password must meet the Windows password policy requirements of the computer that is running the instance of SQL Server. Specifies a password with which to encrypt or decrypt the database master key. To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. REGENERATE WITH ENCRYPTION BY PASSWORD ='password' Syntax for Azure Synapse Analytics and Analytics Platform System REGENERATE WITH ENCRYPTION BY PASSWORD = 'password'ĪDD ENCRYPTION BY Transact-SQL syntax conventions Syntax - Syntax for SQL Server This lets the person with the master key access any lock in the group, while someone with a change key can open only his or her own lock.Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)Ĭhanges the properties of a database master key. In this lock design, the lowest pin is the same length in each lock in the group, but the master wafer varies in length. In both cases, there is a gap at the shear line and the key is able to turn. ![]() The change key might raise the pins so that the shear line is just above the top of the master wafer, while the master key might raise the pins so the shear line is at the bottom of the master wafer. When three pins are combined in a shaft, there are two ways to position the pins so they open the lock. This third pin is called a master wafer or spacer. In these locks, a few of the pin pairs are separated by a third pin. The change key will open only that specific lock, while the master key will open that lock and several others in a group. Some locks are designed to work with two different keys. ![]() The right combination of pins lines up perfectly with the notches in the key. The correct key will push each pin pair up just enough so that the point where the two pins come together lines up perfectly with the space where the cylinder and the housing come together - this point is called the shear line. The incorrect key will push the pins so that most of the top pins are still partly in the plug and partly in the housing. When you insert a key, the series of notches in the key push the pin pairs up to different levels. ![]()
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