Broadcast receiving device and information processing system

An information processing system comprising:

• a broadcast receiving device configured to receive broadcast waves;
• an external device configured to manage information indicating that a broadcast program contained in the broadcast waves has been viewed on the broadcast receiving device;
• and
• an information issuing device configured to transmit specific information to the external device, wherein
• the broadcast receiving device includes:
• a tuner configured to receive information identifying a broadcast program, and a viewing certificate certifying that a specific broadcast program has been received from broadcast waves;
• an acquirer circuit configured to acquire the viewing certificate received by the tuner;
• a signature executor circuit configured to sign the acquired viewing certificate by using a key;
• a network interface connected to an external device via a network;
• a command receiver configured to receive a command to acquire the viewing certificate from the external device;
• a transmitter configured to transmit the viewing certificate to which the signature is applied to the external device that has issued the acquisition command;
• a permit receiver configured to receive, from the external device, a use permit containing source information of an application executed by the external device;
• and
• a second determiner circuit configured to compare the source information received from the external device with source information contained in the use permit
• the external device includes:
• a command transmitter configured to request the broadcast receiving device to transmit the viewing certificate;
• a viewing certificate receiver configured to receive the viewing certificate;
• a viewing certificate storage configured to store the received viewing certificate;
• and
• a viewing certificate transmitter configured to transmit the stored viewing certificate to the information issuing device, and
• the information issuing device includes:
• a public key manager circuit configured to manage a public key for verifying a signature of a viewing certificate;
• a viewing certificate checker circuit configured to verify whether the signature applied to the viewing certificate received from the external device is valid by using the public key;
• a coupon manager circuit configured to manage a predetermined coupon to be issued;
• and
• a coupon issuer circuit configured to issue the coupon from, the coupon manager when the viewing certificate is determined to be valid by the viewing certificate checker.