RENTAL CONTENTS DISTRIBUTION SYSTEM AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a distribution system and method for improving benefit and convenience of a user, eliminating the profit loss of a shop, and safely protecting contents in the distribution of the digital contents. SOLUTION: A reproducing device 106 and an IC card authenticate each other; the IC card and a control center 101 authenticate each other; the IC card transmits a reproducing device public key certificate received from the reproducing device to the control center; a terminal receives contract information including a contents title and a rental period from the user; the control center receives the contract information with the signature by the IC card; the control center ciphers a contents ciphering key or the like by using the reproducing device public key or the like and sends it with the signature to the terminal; the terminal writes it in the IC card; if the result of the signature collation is correct, the terminal records the contents in a recording medium 105; the reproducing device 106 decodes the cryptographic key of the ciphered contents received from the IC card and decodes the contents by using the same.