Certificate confirmation method, certificate confirmation program and certificate that can readily and more positively confirm authenticity of certificate
First Claim
1. A method of confirming a certificate document by using a management computer that issues the certificate document, the management computer being coupled to an application terminal for applying for issuance of the certificate document and to a confirmation terminal for reading a display code printed on the certificate document,the management computer performing the steps of:
- specifying contents to be certified based on an application item received from the application terminal;
issuing the certificate document by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified;
recording an issuance history of the certificate document; and
when data of a compressed value are received from the confirmation terminal that reads the display code on the certificate document, notifying the confirmation terminal of authenticity of the certificate document based on a result of comparison between the received compressed value and the compressed value calculated in the step of issuing the certificate document.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of confirming a certificate by using a management computer that issues the certificate is disclosed. The management computer is coupled to an application terminal for applying for issuance of the certificate and to a confirmation terminal for reading a display code printed on the certificate. The management computer performs the steps of: specifying contents to be certified based on an application item received from the application terminal; issuing the certificate by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified; recording an issuance history of the certificate; and when data of a compressed value are received from the confirmation terminal that reads the display code on the certificate, notifying the confirmation terminal of authenticity of the certificate based on a result of comparison between the received compressed value and the compressed value calculated in the step of issuing the certificate.
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Citations
17 Claims
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1. A method of confirming a certificate document by using a management computer that issues the certificate document, the management computer being coupled to an application terminal for applying for issuance of the certificate document and to a confirmation terminal for reading a display code printed on the certificate document,
the management computer performing the steps of: -
specifying contents to be certified based on an application item received from the application terminal; issuing the certificate document by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified; recording an issuance history of the certificate document; and when data of a compressed value are received from the confirmation terminal that reads the display code on the certificate document, notifying the confirmation terminal of authenticity of the certificate document based on a result of comparison between the received compressed value and the compressed value calculated in the step of issuing the certificate document. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer readable information recording medium containing computer program instructions for confirming a certificate document by using a management computer that issues the certificate document, the management computer being coupled to an application terminal for applying for issuance of the certificate document and to a confirmation terminal for reading a display code printed on the certificate document,
the computer readable information recording medium causing the management computer to function as: -
specifying means for specifying contents to be certified based on an application item received from the application terminal; issuing means for issuing the certificate document by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified; recording means for recording an issuance history of the certificate document; and notifying means for notifying, when data of a compressed value are received from the confirmation terminal that reads the display code on the certificate document, the confirmation terminal of authenticity of the certificate document based on a result of comparison between the received compressed value and the compressed value calculated by the issuing means. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A certificate document created by a method comprising the steps of:
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specifying contents to be certified based on an application item received from an application terminal; issuing the certificate document by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified; and printing the certificate document based on the print data, wherein the certificate document is authenticatable by reading the display code of the certificate document and comparing the display code'"'"'s compressed value with an issuance history of the certificate document.
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Specification