Image data recording apparatus and method, and image data...

Details Image data recording apparatus and method, and image data... Image data recording apparatus and method, and image data...

2007-02-20

2007-02-20

Nguyen, Huy (Department: 2621)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000

Reexamination Certificate

active

09949803

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.

REFERENCES:
patent: 6334025 (2001-12-01), Yamagami
patent: 6853731 (2005-02-01), Boyle et al.
patent: 6938162 (2005-08-01), Nagai et al.
patent: 0773490 (1997-05-01), None

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