Transport-level security: applies security checks as part of establishing a connection between a client and a proxy SERVICE. The security requirements that you can impose through transport-level security depend on the protocol that you configure the proxy service to use. For information about configuring transport-level security for each supported protocol, see Configuring Transport-Level Security.

• CUSTOM Authentication: for message-level security and client-specified custom authentication credentials for inbound transport- and message-level REQUESTS. The custom authentication credentials can be in the form of a custom token, or a username and password.
• Message-level security: for proxy SERVICES that are Web Services. This is part of the WS-Security SPECIFICATION. It applies security checks before processing a SOAP message or specific parts of a SOAP message.

 Transport-level security: applies security checks as part of establishing a connection between a client and a proxy service. The security requirements that you can impose through transport-level security depend on the protocol that you configure the proxy service to use. For information about configuring transport-level security for each supported protocol, see Configuring Transport-Level Security.