Patent Number: 7,134,026

Title: Data terminal device providing backup of uniquely existable content data

Abstract: In a cellular phone, a controller stores content data received from a distribution server into a memory. When the content data is to be transmitted to a memory card, a random number key generator generates a license key, and an encryption processing unit encrypts the content data using the license key. The controller transmits encrypted content data to a memory card via a memory card interface. Then, the controller deletes the content data stored in the memory. As a result, distribution of content data that must be deleted when transferring to another apparatus can be facilitated while protecting the copyright.

Inventors: Horiuchi; Keiji (Gifu, JP), Yoshikawa; Takatoshi (Ogaki, JP), Hioki; Toshiaki (Ogaki, JP), Hori; Yoshihiro (Gifu, JP)

Assignee: Sanyo Electric Co. Ltd.

International Classification: G06F 11/30 (20060101); G06F 12/14 (20060101); G06Q 99/00 (20060101); H04K 1/00 (20060101); H04L 9/32 (20060101); H04N 7/167 (20060101)

Expiration Date: 2019-11-07 0:00:00