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. 20, 2007
Filed:
Aug. 20, 2000
Masayuki Hatanaka, Kawasaki, JP;
Jun Kamada, Kawasaki, JP;
Takahisa Hatakeyama, Kawasaki, JP;
Takayuki Hasebe, Kawasaki, JP;
Seigou Kotani, Kawasaki, JP;
Shigeki Furuta, Kawasaski, JP;
Taizou Kinoshita, Kokubunji, JP;
Takeaki Anazawa, Tokyo, 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, Kawasaski, JP;
Taizou Kinoshita, Kokubunji, JP;
Takeaki Anazawa, Tokyo, JP;
Toshiaki Hioki, Ogaki, JP;
Miwa Kanamori, Ogaki, JP;
Yoshihiro Hori, Gifu, JP;
Abstract
A memory card performs decryption processing to extract a session key from data applied from a server to a data bus over a cellular phone network. An encryption processing unit encrypts a public encryption key of memory card based on a session key, and applies the same to the server via data bus. A register receives and stores data such as a decrypted license ID and a user ID from the server, and a memory receives and stores encrypted content data applied from a data bus and encrypted with a license key.