To provide technique which can make it more difficult to perform a brute force attack on personal identification numbers than heretofore.
An information processor comprises: a reception unit for receiving user identification information of a user; a deposit amount acquisition unit for acquiring a deposit amount deposited by the user; a registration information extraction unit for extracting a personal identification number and account information of the user that correspond to the user identification information from a database; a user authentication unit for performing user authentication by verifying correspondence between the personal identification number and the deposit amount; and a transaction processing unit for, when the user authentication unit determines that the user authentication is successful based on the correspondence between the personal identification number and the deposit amount, accepting transactions based on the account information.
| JPH04191975 | AUTOMATIC TRANSACTION DEVICE |
| JP6522197 | Payment device |
| JP2006252493 | METHOD OF SKIMMING PREVENTIVE MECHANISM IN AUTOMATIC CASH REGISTER |
松倉 秀実
畑添 隆人
高田 大輔
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