| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique for disclosing partially encrypted (concealed) image data by both of paper media and digital media and achieving browser's decoding processing and partial originality verification. <P>SOLUTION: A digital signature is attached to the whole hash value of original image data and registered together with an original, a concealing portion to be concealed in the original image data is print-encrypted and digitally encrypted, the print-encrypted concealing portion is printably buried in the original image data and disclosed as encrypted image data to a print disclosure request, and in verification processing, a hash value obtained from the encrypted image data is compared with a hash value obtained from the original image data. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
