Patent ID: 7487547

Claim:
A contents processing device for outputting enciphered contents to a recording medium comprising: a contents storage unit for storing contents; a first ID storage unit for storing a first ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device; a second ID storage unit for storing a second ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device and being different from the first ID; a ciphering unit which, when said first ID is stored in said first ID storage unit, obtains said first ID from said first ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a first ciphering key generated from said first ID, and when said first ID is not stored in said first ID storage unit, obtains said second ID from said second ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a second ciphering key generated from said second ID; an output unit for outputting the enciphered contents and enciphered title keys toward said recording medium.