The following table describes subelements for the message-security element.
Table A–73 message-security Subelements| 
 Element  | 
 Required  | 
 Description  | 
|---|---|---|
| 
 one or more  | 
 Specifies the methods or operations to which message security requirements apply.  | 
|
| 
 zero or one  | 
 Defines the authentication policy requirements of the application’s request processing.  | 
|
| 
 zero or one  | 
 Defines the authentication policy requirements of the application’s response processing.  |