You administer a SQL Server 2008 instance. The instance hosts a database that is used by a Web-based application. The application processes 15,000 transactions every minute. A table in the database contains a column that is used only by the application. This column stores sensitive data. You need to store the sensitive data in the most secure manner possible. You also need to ensure that you minimize the usage of memory space and processor time.
Which encryption type should you use?（）

You administer a SQL Server 2008 instance. You plan to design the security requirements for a new database application that will be deployed to the instance.  The new database contains a table that is created by using the following code segment: You need to ensure that the BonusPlan column is protected from unauthorized access by using the most secure method.
What should you do?（）