![]() Observe the following code that shows that I can create the same key twice as is evidence by my encrypting a value with the "first" key, dropping the key, re-generating it with the same KEY_SOURCE and IDENTITY_VALUE, and then decrypting the encrypted value. Your assessment is correct in that by knowing those two values, you can re-create the key. If you need to have the ability to duplicate a symmetric key, you should provide KEY_SOURCE and IDENTITY_VALUE. If a dependent key cannot be decrypted during a forced restore, data that is secured by that key will be lost. ![]() The service master key directly or indirectly secures all other keys in the tree. I tried the next code, but seems it is not safe to me, because if you know KEY_SOURCE and IDENTITY_VALUE you actually do not need original Database Master Key and Certificate to decrypt the data CREATE SYMMETRIC KEY MySymmetricKey WITH KEY_SOURCE = '', ALGORITHM = AES_256, IDENTITY_VALUE = '' ENCRYPTION BY CERTIFICATE MyEncryptCert The service master key is the root of the SQL Server encryption hierarchy. Without it I can not decrypt the encrypted data if I move the encrypted table to another Database. As long as the SQL instance is still functional, the Service Master Key and Database Master Key will still be functional. BACKUP MASTER KEY TO FILE = 'c:\temp\key' ENCRYPTION BY PASSWORD = '' īACKUP CERTIFICATE MyEncryptCert TO FILE = 'c:\temp\cert' WITH PRIVATE KEY(ENCRYPTION BY PASSWORD='', FILE='C:\temp\cert.pvk')īut I can not backup Symmetric Key. ![]() I am able to backup Database Master Key and Certificate. ![]() The agent must reside on the same server as. You must provide the full path for the backup file and a password for encrypting the key in that file. The agent provides services that allow Arcserve Backup to back up and restore. SET = ENCRYPTBYKEY(KEY_GUID('MySymmetricKey'), '') BACKUP SERVICE MASTER KEY TO FILE 'E:\Cert\SvcMasterKey.key' ENCRYPTION BY PASSWORD 'pwDD1234' The statement itself is fairly straightforward. How I encrypt data OPEN SYMMETRIC KEY MySymmetricKey DECRYPTION BY CERTIFICATE MyEncryptCert I use the next code to create SQL Encryption keys CREATE MASTER KEY ENCRYPTION BY PASSWORD = ''ĬREATE CERTIFICATE MyEncryptCert WITH SUBJECT = 'Descryption', EXPIRY_DATE = ''ĬREATE SYMMETRIC KEY MySymmetricKey WITH ALGORITHM = AES_256 ENCRYPTION BY CERTIFICATE MyEncryptCert
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