Method and apparatus for secure distribution of software/data

Details Method and apparatus for secure distribution of software/data Method and apparatus for secure distribution of software/data

2005-01-25

2005-01-25

Trammell, James P. (Department: 3621)

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

Business processing using cryptography

Usage protection of distributed data files

C705S001100, C380S277000

Reexamination Certificate

active

06847948

ABSTRACT:
A method and apparatus is disclosed for preventing an unauthorized computer system from using copied software or data. An identification code provided by a client computer is combined with a pre-determined number provided by the source of software or data to be copied to generate at least one unique encryption key. Prior to each use the encrypted program re-derives the original encryption key, which includes the identification code of the client computer, to decrypt the critical files prior to use. The identification code may be a unique identifier associated with the client computer such as a network identifier or a processor ID provided by the client computer.

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Schneier, Bruce Applied Cryptography, second edition, 1996. p. 173.

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