Patent attributes
An example system is configured to (i) generate an authorization code that has an expiration time, (ii) transmit at least one first message including the authorization code over a WAN, (iii) receive at least one second message including the authorization code from a playback device over the WAN, (iv) determine that the received authorization code is valid based at least on the expiration time, (v) after determining that the authorization code is valid, generate a first authorization token, (vi) transmit at least one third message including the first authorization token to the playback device over the WAN, (vii) receive at least one fourth message including a second authorization token and a request from the playback device over the WAN, (viii) determine that the second authorization token is valid, and (ix) after determining that the second authorization token is valid, provide the playback device with audio content based on the request.
