Title:
PROGRAM ANALYSIS PREVENTING DEVICE
Document Type and Number:
Japanese Patent JP3400480
Kind Code:
B2
Abstract:
PURPOSE: To avoid receiving an adverse influence from the backup function of a power source, to be easily restored and to surely prevent illegal program analysis.
CONSTITUTION: This program analysis preventing device is composed of a high-order device 10 provided with a key input part 11 inputting a ciphering key, a ciphering key storage part 12a storing and holding the ciphering key, a program editing part 12b deciphering a program ciphered in accordance with the ciphering key and a control part 15 controlling each part, and a terminal equipment 20 provided with a program storage part 21a storing and holding an operation program, a ciphering key storage part 21b storing and holding the ciphering key, a program editing part 21c ciphering the operation program in accordance with the ciphering key and a control part 24 controlling each part.
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Inventors:
Toshio Tonouchi
Application Number:
JP2467293A
Publication Date:
April 28, 2003
Filing Date:
January 20, 1993
Export Citation:
Assignee:
CSK Corporation
International Classes:
G06F9/445; G06F1/00; G06F9/06; G06F15/00; G06F21/00; G06F21/12; G06F21/14; G06F21/60; G09C1/00; (IPC1-7): G06F15/00; G06F1/00
Domestic Patent References:
| JP4117548A |
Attorney, Agent or Firm:
Mikio Murata