Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Information processing apparatus and method, recording medium and program
An electronic device that generates first authentication data; outputs a first response request generated based on the first authentication data; receives a first response message based on the first response request command, the first response message including second authentication data based on the first authentication data; outputs a second response request command after receiving the first response message; counts a time elapsed from transmitting the second response request; receives a second response message based on the second response request command, the second response message including third authentication data generated at the second electronic device based on the first authentication data; compares the third authentication data included in the second response message with expected authentication data generated by the electronic device based on the first authentication data; and judges if the second electronic device is authorized to use content data based on the comparison result and the counted time.
Sony Corporation
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Takehiko Hisato
Nakano Shima