Program distribution method and system

Details Program distribution method and system Program distribution method and system

2004-08-17

2009-06-23

Fischer, Andrew J (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S058000

Reexamination Certificate

active

07552092

ABSTRACT:
In the present invention, a program is provided with a dummy module into which a watermark can be inserted without any effect on the operation of the program, and an digital signature. It is thereby possible for a distributor to insert a watermark for specifying a user to the dummy module, and to prevent unauthorized leakage of the program by the distributor. Further, by providing the program body with an digital signature, it is possible to prevent tampering of the program by the distributor.

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English language Abstract of JP 11-136618 A.
English language Abstract of JP 10-254909 A.
English language Abstract of JP 2004-157703 A.
English language Abstract of JP 2000-076064 A.
English Language Abstract of JP 2000-324096.
English Language Abstract of JP 2000-330873.

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