US 6,981,634 B2 | ||
Keystroke trapping system, keystroke trapping method and keystroke trapping program | ||
Katsuya Ogawa, Kanagawa (Japan) | ||
Assigned to NEC Infrontia Corporation, Kanagawa (Japan) | ||
Filed on Oct. 27, 2003, as Appl. No. 10/692,849. | ||
Claims priority of application No. 2002-312953 (JP), filed on Oct. 28, 2002. | ||
Prior Publication US 2004/0084516 A1, May 06, 2004 | ||
Int. Cl. G07G 1/00 (2006.01) |
U.S. Cl. 235—12 | 12 Claims |
1. A keystroke trapping system comprising:
a first means for reading out, in sequence, function numbers in sales data stored in a memory unit, collating them with function
numbers in a depressing limit master stored in the memory unit in sequence, and when they are coincided to each other, adding
1 to a limit counter of the depressed function key corresponding to the function number;
a second means for comparing a value of the limit counter of the function key corresponding to the function number with the
corresponding limit count in the depressing limit master;
a third means for sending it to a host computer that the depressing of the key corresponding to the function number exceeds
the limit count if the value of the limit counter exceeds the limit count;
a fourth means for resetting the limit counter.
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