INFORMATION SELLING DEVICE, ITS METHOD AND PROGRAM STORAGE MEDIUM

摘要

PURPOSE: To prevent sold information from being illegally used. CONSTITUTION: A digital information storage function 212 stores digital information 6 to be sold. A license generation function 227 generates an application condition corresponding to the digital information 6. A ciphering function 229 ciphers the digital information 6. A digital information key generation function 228 generates a cipher key for deciphering the ciphered digital information 6. A certification function 214 certifies a recording medium 102-1 provided with a license management function and attached to a digital information selling device 101. A digital information writing function 230 with license writes the ciphered digital information in the recording medium 102-1 together with the application condition and the cipher key.