Verification method, verification device, and computer product

摘要

A verification device 101 receives extracted and sanitized data 113 that has been sanitized to protect the privacy of person A. The verification device 101, extracts from among MCU-hash storage data 123 and for MCU1 and MCU2 among MCUs obtained by dividing the extracted and sanitized data 113, an MCU1 hash and an MCU2 hash. The verification device 101 generates an MCU3 hash to an MCU6 hash and from the MCU1 hash to the MCU6 hash, generates a JPEG frame hash 125. The verification device 101 then compares a JPEG hash 121 and the JPEG hash 125 to verify the authenticity of the extracted and sanitized data 113.

主权项

1. A verification method executed by a computer, the verification method comprising:
receiving a first image that is a verification subject; acquiring for third and fourth areas that are at positions identical to positions of first and second areas and are among a plurality of areas obtained by dividing the first image, digest information of the first and second areas before correction, the digest information being acquired from a first storage unit that stores the digest information of the first area before correction, position information of the first area that is a correction target among a plurality of areas obtained by dividing a second image that is an original, and the digest information of the second area before correction, the second area being identified based on the position information of the first area; generating digest information for other areas different from the third and fourth areas and among the areas obtained by dividing the first image; generating digest information for the first image from a digest target linked to the acquired digest information and to the generated digest information according to position information of areas that are among the areas obtained by dividing the first area and that correspond to the acquired digest information and the generated digest information; and reading digest information from a second storage area storing digest information generated from a digest target linked, according to position information of the areas obtained by dividing the second image, to digest information of the areas obtained by dividing the second image, and verifying authenticity of the first image by comparing the read digest information and the digest information generated for the first image.