Contents distribution system, contents distribution apparatus, terminal, and method of distributing contents

摘要

The contents distribution apparatus has a conversion section 9, composite key generation section 8, and adder 10. The conversion section 9 converts contents C to generate converted contents C/Nc using a contents identification number Nc previously allocated to the contents. The composite key generation section 8 generates a composite key from the contents identification number Nc, a storage identification number Ns, and a terminal key alpha corresponding to the terminal. The adder 10 adds the composite key K generated by the composite key generation section 8 to the converted contents C/Nc generated by the conversion section 9 so as to generate added conversion contents C'.