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You manage on-premises and Microsoft Azure SQL Database instances for a company. Your environment must support the Microsoft SQL Server 2012 ODBS driver.
You need to encrypt only specific columns in the database.
What should you implement?
A . transport-level encryption
B . cell-level encryption
C . Transparent Data Encryption
D . Always Encrypted
E . Encrypting File System
F . BitLocker
G . dynamic data masking
Answer: D
Explanation:
To encrypt columns you can configure Always Encrypted.
SQL Server Management Studio (SSMS) provides a wizard that helps you easilyconfigure Always Encrypted by setting up the column master key, column encryption key, and encrypted columns for you.
Always Encrypted allows client applications to encrypt sensitive data and never reveal the data or the encryption keys to SQL Server or Azure SQL Database. An Always Encrypted enabled driver, such as the ODBC Driver 13.1 for SQL Server, achieves this by transparently encrypting and decrypting sensitive data in the client application.
Note: The ODBC driver automatically determines which query parameters correspond to sensitive database columns (protected using Always Encrypted), and encrypts the values of those parameters before passing the data to SQL Server or Azure SQL Database. Similarly, the driver transparently decrypts data retrieved from encrypted database columns in query results.
References: https://docs.microsoft.com/en-us/azure/sql-database/sql-database-always-encrypted-azure-key-vault#encrypt-columns-configure-always-encrypted
https://msdn.microsoft.com/en-us/library/mt637351(v=sql.110).aspx