Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahiro Shishikura0
Date of Patent
April 12, 2011
0Patent Application Number
112198650
Date Filed
September 7, 2005
0Patent Primary Examiner
Patent abstract
This invention is to prevent a MAC of a correct answer from being calculated by use of an IC card even if count data in the database of a PC is falsified since the MAC calculated by the IC card is made invisible from the exterior of the IC card. Thus, falsification of data by enciphering the number (total sum) of cut sheets in a sheet checking equipment.
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