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.