| 摘要 |
A check processing system enables determining if tampering has occurred while sending check image information captured by a check processing device to a server. The digitally watermarked image information and the magnetic ink character data are then sent through a host computer to the server. If the image information is tampered with on the host computer, the server cannot extract the magnetic ink character data from the received image information, and even if the magnetic ink character data can be extracted, the extracted magnetic ink character data will be different from the magnetic ink character data received by the server.
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