| 摘要 |
PROBLEM TO BE SOLVED: To verify the propriety of data transfer in a short time even in the case that object data are the ones of large capacity. SOLUTION: In this composite system composed of a transfer origin system A and a transfer destination system B, etc., connected through the Internet, the system A is provided with a check data preparing function 100 for processing the object data by a cipher hash function and preparing first check data and a transfer means for transferring the first check data to the system B together with the object data. The system B is provided with a reception means for receiving the first check data and the object data transferred from the system A, a check data preparing function 200 for processing the object data by the cipher hash function and preparing second check data and a comparing function 300 for comparing the second check data and the first check data.
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