In a cellular phone, a controller stores content data and additional information obtained from a distribution server into a memory. When the content data is to be transmitted to a memory card, a random number key generation unit generates a license key. An encryption processing unit encrypts the content...http://www.google.fr/patents/US20030009667?utm_source=gb-gplus-shareBrevet US20030009667 - Data terminal device that can easily obtain content data again, a program executed in such terminal device, and recording medium recorded with such program
Data terminal device that can easily obtain content data again, a program ...
