Access the Server Manager for a server instance and click the Preferences tab.
Click the Set Cipher Size link.
From the drop-down list, select the resource to which to apply stronger ciphers, and then click Select. You can also specify a regular expression.
For more information, see Chapter 16, Managing Templates and Resources.
Select the secret key size restriction:
Specify the file location of the message to reject access, and click OK.
For more information about ciphers, see Introduction to SSL.