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:
Sep. 12, 2001
Osamu Saito, Asaka, JP;
Osamu Saito, Asaka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A media ID specific to a memory card is recorded on the memory card and a device ID specific to a camera is stored in the camera. If image data and voice data are obtained, these items of data are subjected to a first encryption operation using the device ID as an encryption key. The encrypted data is subjected to a second encryption operation using the media ID as an encryption key, resulting in doubly encrypted data. At playback, the media ID is read from the memory card and is subjected to a first decryption operation. The device ID is read from a device-ID memory and a second decryption operation is performed using the device ID as a decryption key. These IDs cannot be rewritten and decryption cannot be carried out unless these IDs are used. Even if data is copied without authorization, therefore, the data cannot be decrypted. This makes it possible to prevent the unauthorized utilization of the data.