| http://www.w3.org/ns/prov#value | - The method of claim 1, wherein the step of including in selected ones of the unique watermarks the unique decryption key further comprises the step of watermarking all of the plurality of images in the image group with the unique watermark having the unique decryption key of the next image in the image group, and wherein a first image in the image group is defined as the next image for a last imag
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