| 摘要 |
A certification result obtained by a master device 2 for a slave device 3 is notified to a master data processing device 6 while making a part of determination result data supplied from a master certification device 5 to the master data processing device 6 accompany with the rest of the determination result data supplied from the master certification device 5 to the master data processing device 6 through the slave device 3. Even when the part of the determination result data and the rest of the determination result data are plain text, they are given from different routes 11 and 10. Accordingly, the confidentiality for the determination result can be enhanced as compared to the case where all of the determination results are given from the master certification device 5 to the master data processing device 6. Thus, it is not necessary to enhance the confidentiality for the determination result of the certification process by allowing the master data processing device to execute an encryption/decryption processing program.
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