METHOD FOR EXECUTING DIGITAL DATA PROCESSED PRODUCT PROVIDING SERVICE, DIGITAL DATA RECEIVING METHOD, RECORDING MEDIUM CREATING METHOD, KEY MANAGING METHOD, ENCRYPTED DIGITAL DATA GENERATING METHOD, DIGITAL DATA RECEIVING PROGRAM, RECORDING MEDIUM CREATING PROGRAM, KEY MANAGING PROGRAM, ENCRYPTED DIGITAL DATA GENERATING PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To ensure the security of the transfer of digital data while simplifying the transfer.;SOLUTION: Digital data are received from a user of a service by a step wherein a key control server 42 of a service provider generates an encryption key and a decoding key corresponding to a recording medium 56 which is used for receiving the digital data and records the decoding key in a database 44 in association with the recording medium 56, a step wherein a store terminal 46 of the service provider records the encryption key which is generated in correspondence with the recording medium 56 on the recording medium 56, a step wherein a user's terminal 52 of the user of the service obtains the encryption key from the recording medium 56, encrypts selected digital data by using the encryption key and records it on the recording medium 56, and a step wherein the store terminal 46 obtains a decoding key corresponding to the recording medium 56 on which the encrypted digital data are recorded from the database 44 and decodes them by using the decoding key.;COPYRIGHT: (C)2007,JPO&INPIT