This technique is an alternative to a username/password style of authentication, where the token can be granted based on a property of the client.

The control flow is as follows:

1. The client SWF requests an authentication token from a third party.
2. The third party returns the token to the client.
3. The client sends the token with its connection request.
4. Flash Media Server verifies the token with the third party system.
5. Flash Media Server accepts the connection.