The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2006
Filed:
Aug. 09, 2000
Masayuki Hatanaka, Kawasaki, JP;
Jun Kamada, Kawasaki, JP;
Takahisa Hatakeyama, Kawasaki, JP;
Takayuki Hasebe, Kawasaki, JP;
Seigou Kotani, Kawasaki, JP;
Shigeki Furuta, Kawasaki, JP;
Takeaki Anazawa, Tokyo, JP;
Tadaaki Tonegawa, Kodaira, JP;
Toshiaki Hioki, Ogaki, JP;
Miwa Kanamori, Ogaki, JP;
Yoshihiro Hori, Gifu, JP;
Masayuki Hatanaka, Kawasaki, JP;
Jun Kamada, Kawasaki, JP;
Takahisa Hatakeyama, Kawasaki, JP;
Takayuki Hasebe, Kawasaki, JP;
Seigou Kotani, Kawasaki, JP;
Shigeki Furuta, Kawasaki, JP;
Takeaki Anazawa, Tokyo, JP;
Tadaaki Tonegawa, Kodaira, JP;
Toshiaki Hioki, Ogaki, JP;
Miwa Kanamori, Ogaki, JP;
Yoshihiro Hori, Gifu, JP;
Fujitsu Limited, Kawasaki, JP;
Nippon Columbia Co., Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A memory cardextracts a session key Ks from the data applied onto a data bus BSby carrying out a decryption process. An encryption processing unitencrypts a public encryption key KPcard(1) of memory cardbased on session key Ks, and applies the encrypted key to a server via data bus BS. A memoryreceives from a server data such as license key Kc, license ID data License-ID and user ID data User-ID encrypted with a public encryption key KPcard(1) differing for each memory card for storage, and receives encrypted content data [Dc]Kc encrypted with license key Kc from data bus BSfor storage.