Image verification system
First Claim
1. An image verification system comprising:
- an imaging device including (a) an image generating unit which generates image data, and (b) a first verification data generating unit which generates first verification data using the image data and common information; and
a first image verification device including (a)a first verification unit which verifies whether or not the image data is modified, using the image data, the first verification data, and the common information, (b) an embedding unit which, if it is verified by the first verification unit that the image data is not modified, embeds watermark data for detecting a modified portion of the image data so as to generate watermarked image data, and (c) a second verification data generating unit which generates second verification data using the watermarked image data and secret information.
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Accused Products
Abstract
An image verification system includes an imaging device and a first image verification device. The imaging device has an image generating unit which generates image data, and a first verification data generating unit which generates first verification data using the image data and common information. In the first image verification device, a first verification unit verifies whether or not the image data is modified using the image data, the first verification data, and the common information. If it is verified by the first verification unit the image data is not modified, an embedding unit embeds watermark data to detect a modified portion of the image data in order to generate watermarked image data. A second verification data generating unit generates second verification data using the watermarked image data and secret information.
31 Citations
30 Claims
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1. An image verification system comprising:
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an imaging device including (a) an image generating unit which generates image data, and (b) a first verification data generating unit which generates first verification data using the image data and common information; and a first image verification device including (a) a first verification unit which verifies whether or not the image data is modified, using the image data, the first verification data, and the common information, (b) an embedding unit which, if it is verified by the first verification unit that the image data is not modified, embeds watermark data for detecting a modified portion of the image data so as to generate watermarked image data, and (c) a second verification data generating unit which generates second verification data using the watermarked image data and secret information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image verification system comprising:
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an imaging device including (a) an image generating unit which generates image data, (b) and a first verification data generating unit which generates first verification data using the image data and common information; a transmitter which transmits the image data and the first verification data provided by the imaging device; and a first image verification device that receives the image data and the first verification data transmitted by the transmitter, wherein the first image verification device includes (a) a first verification unit which verifies whether or not the image data is modified, using the image data, the first verification data, and the common information, (b) an embedding unit which, if it is verified by the first verification unit that the image data is not modified, embeds watermark data for detecting a modified portion of the image data so as to generate watermarked image data, and (c) a second verification data generating unit which generates second verification data using the watermarked image data and secret information. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. An image verification device comprising:
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an image verification unit which verifies whether or not image data generated by an imaging device is modified, using the image data, first verification data, and common information; an embedding unit which, if it is verified by the image verification unit that the image data is not modified, embeds watermark data for detecting a modified portion of the image data so as to generate watermarked image data; and a verification data generating unit which generates second verification data using the watermarked image data and secret information. - View Dependent Claims (19, 20, 21, 22, 23)
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24. An image verifying method comprising the steps of:
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verifying whether or not image data generated by an imaging device is modified, using the image data, first verification data, and common information; if it is verified in the verifying step that the image data is not modified, embedding watermark data for detecting a modified portion of the image data so as to generate watermarked image data; and generating second verification data using the watermarked image data and secret information. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A computer readable recording medium storing a program executing an image verifying method, the image verifying method comprising the steps of:
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verifying whether or not image data generated by an imaging device is modified, using the image data, first verification data, and common information; if it is verified in the verifying step that the image data is not modified, embedding watermark data for detecting a modified portion of the image data so as to generate watermarked image data; and generating second verification data using the watermarked image data and secret information.
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Specification