Change the encryption key, with the option of adding dual control.
- In the left pane of the Administration Console, expand .
 
- Click Column Encryption Keys.
 
- Click the Name field of the column encryption key, then click the drop-down
               arrow.
 
- (Optional) To change the encryption key:
- Select Change Password.
 
- Select one of these methods to encrypt the key:
 - Using  a user-defined password – enter the old and new passwords, and confirm the new password.    If With dual control is selected,  both the master key and user-defined password are used to encrypt the column encryption key.  Both master and dual-master keys are used for encryption if both exist in the database.
 
- Using the master key  –  the server encrypts your key using the master key. 
 
- Using the system encryption password  – the server encrypts your key using the system encryption password.  Before choosing this option, ensure that a system encryption password exists in your database.
 
(Optional) Select With dual control to use master and dual-master keys to control the security of your column encryption keys.
  
 
- (Optional)  To set the column encryption key, select Supply Password, and confirm it on the next screen.
 
- (Optional)  To delete the column encryption key, select Delete, and confirm it on the next screen.