Patent ID: 8959342
Filing Date: 2015-02-17
Classification: H04L

Abstract:
1. A communication apparatus that performs data communication with a communication device, the communication apparatus comprising: an authentication processing portion configured to perform authentication processing based on a Digital Transmission Content Protection (“DTCP”) standard, including a round trip time (RTT) test on authentication requests received from one or more unauthenticated communication devices; a data communication portion configured to perform data communications with the communication device authenticated by the authentication processing portion; wherein authorization requests for a corresponding communication device are processed in parallel so as to avoid redundant operation of the RTT test; wherein in authentication processing of a current authentication request, if a prior RTT test is being performed corresponding to a prior authentication request originating from the same communication device, then the current RTT test is not performed, and authentication processing waits for the completion of the prior RTT test; and after the prior RTT test has been completed, if the result of the prior RTT test is successful, then authentication processing uses the result of the prior RTT test as the result corresponding to the current authentication request, and if the result of the prior RTT test is not successful, authentication processing performs the current RTT test corresponding to the current authentication request.