Information processing apparatus, information processing method, and computer program

An information processing method executed in an information processing apparatus for receiving broadcast data and outputting the received broadcast data to a client connected to a network, the information processing method comprising the steps of:

• receiving the broadcast data at a broadcast receiving unit;
• performing, with an encryption processor, encryption on the broadcast data received by the broadcast receiving unit to generate encrypted data, wherein the encrypted data is a protected content packet, and wherein the protected content packet includes a plurality of timestamped transport stream packets formed by adding a timestamp to a transport stream packet, and wherein the protected content packet has a size that is an integral multiple of the size of one of the plurality of the timestamped transport stream packets;
• accumulating, with a data accumulation unit, the encrypted data generated by the encryption processor;
• associating an input time at which the protected content packet was input from the encryption processor to the data accumulation unit, recording the input time associated with the protected content packet, and calculating a retention period for the protected content packet in the data accumulation unit;
• transmitting data with a data transmission unit that generates a communication packet, wherein the communication packet stores the encrypted data accumulated in the data accumulation unit, and outputting the generated communication packet to a network;
• and
• monitoring, with a transmission data controller, a retained state of the protected content packet accumulated in the data accumulation unit and removing the protected content packet if a period of time exceeding a predetermined allowable retention period is exceeded.

A non-transitory computer readable medium encoded with a computer program for causing information processing to be executed in an information processing apparatus that receives broadcast data and outputs the received broadcast data to a client connected to a network, the information processing comprising the steps of:

• receiving the broadcast data at a broadcast receiving unit;
• performing, with an encryption processor, encryption on the broadcast data received by the broadcast receiving unit to generate encrypted data, wherein the encrypted data is a protected content packet, wherein the protected content packet includes a plurality of timestamped transport stream packets, formed by adding a timestamp to a transport stream packet, and wherein the protected content packet has a size that is an integral multiple of the size of one of the plurality of the timestamped transport stream packets;
• accumulating, with a data accumulation unit, the encrypted data generated by the encryption processor;
• associating an input time at which the protected content packet was input from the encryption processor to the data accumulation unit, recording the input time associated with the protected content patent, and calculating a retention period for the protected content packet in the data accumulation unit;
• transmitting data with a data transmission unit that generates a communication packet, wherein the communication packet stores the encrypted data accumulated in the data accumulation unit, and outputting the generated communication packet to a network;
• and
• monitoring, with a transmission data controller, a retained state of the protected content packet accumulated in the data accumulation unit and removing the protected content packet if a period of time exceeding a predetermined allowable retention period is exceeded.