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Image generation equipment and verification data generating method

A technology for image generation and data verification. It is used in image communication, user identity/authority verification, static cameras, etc. It can solve problems such as inability to correctly verify image data and threatening system reliability and security.

Inactive Publication Date: 2003-07-16
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In case a malicious user analyzes the location of confidential information and exposes it, there will be a problem that the change of image data cannot be verified correctly and the reliability and security of the system will be threatened

Method used

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  • Image generation equipment and verification data generating method
  • Image generation equipment and verification data generating method
  • Image generation equipment and verification data generating method

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Embodiment Construction

[0020] first form of implementation

[0021] A first preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0022] Fig. 1 illustrates a configuration example of an image verification system according to the first embodiment. This first embodiment explains the case where the verification data required to verify whether or not the image data has been changed is a digital signature of the image data.

[0023] The image generating device 10 is a device having a function of generating image data of an object and a function of generating a digital signature-attached image file. The image file with a digital signature is an image file that includes image data, a digital signature of the image data, the unique ID of the image generating device 10, additional information on the image data, etc., and the image generating device 10 can be a digital camera, a digital video camera, A photographing device such as a scanner may...

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Abstract

An image generation apparatus, in generating verification data (digital signature or MAC) necessary for detecting an alteration in image data, generates secret information Ks necessary for the generation of the verification data, utilizing secret information A and secret information B. In this manner, the image generation apparatus makes difficult the leakage and the analysis of the secret information Ks, necessary for generation of the verification data for the image data, whereby the safety and the confidentiality of the secret information Ks can be improved.

Description

technical field [0001] The present invention relates to an image generating device and a verification data generating method for generating verification data required for verifying whether image data has changed. technical background [0002] In recent years, digital cameras that digitally store optical images of objects have come into practical use. [0003] Image data captured by a digital camera can be easily imported into a personal computer, but on the other hand, there is a problem that it may be easily changed on the personal computer. Therefore, the reliability of image data captured by digital cameras is lower than that of silver halide photographs, and there is a problem of lack of evidentiary power. Therefore, in recent years, a digital camera system having a function of adding a digital signature to image data captured by a digital camera has been proposed. Existing digital camera systems are disclosed in, for example, US Patent No. 5,499,294 and Japanese Paten...

Claims

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Application Information

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IPC IPC(8): G09C5/00H04L9/08H04L9/32H04N1/21H04N1/32
CPCH04N2101/00H04N2201/3236H04N2201/3235H04N1/32128H04N5/77H04N5/913H04N23/00
Inventor 若尾聡池田康之
Owner CANON KK