DATA TERMINAL EQUIPMENT CAPABLE OF EASILY REACQUIRING CONTENTS DATA, PROGRAM TO BE EXECUTED BY ITS TERMINAL EQUIPMENT, AND RECORDING MEDIUM WITH ITS PROGRAM RECORDED

摘要

PROBLEM TO BE SOLVED: To provide data terminal equipment capable of promoting the circulation of contents data to be erased at the time of transmitting acquired contents data to another device while protecting the copyright. SOLUTION: In a portable telephone set 100, a controller 1022 stores contents data and additional information received from a distribution server in a memory 1024. At the time of transmitting the contents data to a memory card 110, a random number key generating part 1032 generates a license key, and an encryption processing part 1034 encrypts the contents data by using the license key. The controller 1022 transmits the encrypted contents data through a memory card interface 1026 to the memory card 110. Then, the controller 1022 erases only the contents data stored in the memory 1024.