As illustrated in the following diagram, this authentication feature only applies to the link between the Gateway and the CRM.

When the Gateway establishes a connection to the CRM, the following events occur:

1. Each entity issues a challenge.
   • The challenge is based on a random number combined with an authentication key.
   • The authentication key is contained in a key file designated by the process command line specification.
2. Each entity issues a response to the challenge it receives. This response is based on the challenge combined with the entity’s authentication key.
3. Each entity verifies the response by comparing the response to its own calculated result.
   • If the challenge/response exchange fails, the connection is closed and an error is logged.
   • If the challenge/response succeeds, full communications are enabled.