Title:
ILLICIT USAGE PREVENTION SYSTEM FOR PROGRAM
Document Type and Number:
Japanese Patent JPH05158798
Kind Code:
A
Abstract:
PURPOSE: To prevent the normal reading of a program written in a floppy disk medium through a conversion adaptor which converts a control signal without allowing the program to be transmitted through the conversion adaptor.
CONSTITUTION: This system is equipped with a conversion adaptor 2 which code-converts at least one signal among plural interface signals from a host device 1 to a floppy disk drive 3 at the time of storing the program from the host device 1 through the floppy disk drive 3 in the floppy disk medium. At the time of reading the program from the floppy disk medium, the host device 1 is connected through the conversion adaptor 2 to the floppy disk drive 3.
Inventors:
KANAMARU YUKIO
Application Number:
JP32274591A
Publication Date:
June 25, 1993
Filing Date:
December 06, 1991
Export Citation:
Assignee:
NEC NIIGATA LTD
International Classes:
G06F3/06; G06F9/06; G06F12/14; G06F21/10; G06F21/12; G06F21/14; G06F21/62; (IPC1-7): G06F3/06; G06F9/06; G06F12/14
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)