are symmetric keys created by default in sql server?
SQL Server 2005: using symmetric keys to encrypt data. In SQL Server 2005, the recommended method for encrypting data is to use symmetric keys. A symmetric key can be created using the CREATE SYMMETRIC KEY statement. Information about symmetric keys is stored in the sys.symmetric_keys catalog. When a symmetric key is encrypted with a password instead of the public key of the database master key, the TRIPLE DES encryption algorithm is used. Because of this, keys that are created with a strong encryption algorithm, such as AES, are themselves secured by a weaker algorithm. When a symmetric key is created, the symmetric key must be encrypted by using at least one of the following: certificate, password, symmetric key, asymmetric key, or PROVIDER. The key can have more than one encryption of each type. DESX was incorrectly named. Symmetric keys created with ALGORITHM = DESX actually use the TRIPLE DES cipher with a 192-bit key. The DESX algorithm is not provided. This feature will be removed in a future version of Microsoft SQL Server. — create the database master key. create master key encryption by password = ‘Pufd&s@))%’; — create a simple employee table. create table t_employees (id int primary key, name varchar(300), salary varbinary(300)); — create a certificate to protect the symmetric key that will encrypt the data. The following example creates a symmetric key called MySymKey by using a provider called MyEKMProvider and a key name of KeyForSensitiveData. It assigns authorization to User1 and assumes that the system administrator has already registered the provider called MyEKMProvider in SQL Server. How to use SQL Server Encryption with Symmetric Keys. You can quickly and securely encrypt data in SQL Server 2005+ by using the native Symmetric Keys functionality. The most common encryption algorithms symmetric key encryption supports are Des, Triple Des, RC4 128bit, AES 128bit and AES 256bit. Setup your database. In SQL Server 2005, the recommended method for encrypting data is to use symmetric keys. In this post, I’d like to comment on three topics related to using symmetric keys: 1) basics of using a symmetric key. 2) ways to restrict access to a symmetric key. 3) how to prevent a symmetric key loss. — create a key to protect the employee sensitive data, in this case – the salary. create symmetric key sk_employees with algorithm = aes_192 encryption by certificate cert_sk_admin; — open the key so that we can use it. open symmetric key sk_employees decryption by certificate cert_sk_admin; sys.symmetric_keys (Transact-SQL) Returns one row for every symmetric key created with the CREATE SYMMETRIC KEY statement.
No, a symmetric key can be created using the CREATE SYMMETRIC KEY statement.