Digital evidential camera system for generating alteration detection data using built-in encryption key

• US 6,968,058 B1
• Filed: 04/16/1999
• Issued: 11/22/2005
• Est. Priority Date: 04/20/1998
• Status: Expired due to Fees

• Current Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Original Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Inventors: Yamada, Hidetoshi, Komiya, Yasuhiro, Kondoh, Takashi, Higurashi, Masaki
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Moorthy, Aravind K
• Application Number:
  US09/293,142
• Time in Patent Office: 2,412 Days
• Field of Search: 380/30, 380/207, 380/200, 713/176, 396/229, 358/909.1
• US Class Current: 380/200
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 7/188 Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position signal generation from motion picture films H04N5/253

Abstract

A digital evidential camera system is for detecting the alteration of image data obtained by photographing an object. The system comprises the camera and an alteration detection unit. The camera includes an image pickup unit for picking up an image of the object and an encryption processing unit for generating the alteration detection data using an encryption key built therein from the image data obtained by the image pickup unit. The alteration detection unit decrypts the alteration detection data using a decryption key corresponding to the encryption key, and detects whether the image data is altered based on the result of decryption.

Claims

1. A digital image editing system for detecting an alteration of image data and editing the image data, comprising:

a filing management unit for filing and managing the image data input thereto through an image input unit;

an alteration detection unit for decrypting first alteration detection data attached to the image data by use of a decryption key corresponding to a first encryption key used for generating the alteration detection data, and for comparing the first alteration detection data thus decrypted with the image data thereby to detect the alteration of the image data;

an image editing unit for processing the image data; and

an image file updating unit for generating second alteration detection data using a second encryption key other than the first encryption key from the image data processed by the image editing unit and editing history data output by the image editing unit, and for adding the second alteration detection data to the edited image data;

means for adding and storing editor authentication data read from a detachable IC card;

wherein the image file updating unit is removably mounted on the digital image editing system, and has stored therein the editor authentication data and the second encryption key; and

wherein the second alteration detection data is generated using the second encryption key and the editor authentication data.

2. A digital image editing system according to claim 1,

wherein the image data comprises multiple resolution image data including a plurality of image data of different resolutions combined and stored in different sets;

and

wherein the encryption processing unit includes a selection unit for selecting at least an image data having a desired resolution from the multiple resolution image data in order to generate the alteration detection data.

3. A digital image editing system according to claim 1,

wherein the image data comprises multiple resolution image data including a plurality of image data of different resolutions combined and stored in different sets;

wherein each of the multiple resolution image data is stored in units of a predetermined stall block; and

wherein the encryption processing unit generates the alteration detection data in units of the small block.

4. A digital image editing system according to claim 1,

wherein at least a part of the image file updating unit is removably mounted on the digital image editing system, and has stored therein editor information and the second encryption key, and

wherein the second alteration detection data is generated using the second encryption key based on the image data, and data obtained by applying a predetermined function from the editing history data output by the image editing unit.