Method and manufacture for preventing unauthorized use by judgin

Details Method and manufacture for preventing unauthorized use by judgin Method and manufacture for preventing unauthorized use by judgin

1996-06-28

1997-08-26

Swann, Tod R.

Cryptography

Cryptanalysis

3642866, H04L 932

Patent

active

056618000

ABSTRACT:
In case that software is written on a recording medium at physical addresses thereof in units of a prescribed size and the software is subsequently executed upon being read out of the recording medium from the physical addresses in the order of logical addresses, the corresponding relationship between the logical addresses of the software and the physical addresses conforming to the logical addresses, as well as a checking program for preventing unlawful use of the software, is added on to the main body of the software, which is then recorded on an original. Before execution of the software that has been recorded on a recording medium (the original or a copy), the corresponding relationship between the logical and physical addresses on this recording medium is obtained by the checking program. The corresponding relationship obtained and the corresponding relationship that has been added to the software are compared. If the two agree, it is deemed that the recording medium is the original and execution of the main body of the software is allowed. If the two do not agree, execution of the main body of software is not allowed.

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