Method and system for using a portion of a digital good as a...

Cryptography – Communication system using cryptography – Time segment interchange

Reexamination Certificate

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C380S028000, C380S029000, C713S190000

Reexamination Certificate

active

09651424

ABSTRACT:
A portion of a digital good is selected to be used as a substitution box (S-box) in encrypting at least another portion of a digital good. The digital good being encrypted can be the same digital good, or alternatively a different digital good, than the digital good from which the portion used as an S-box is obtained. During the encryption process, the S-box is used to substitute values of the portion being encrypted with new values (a process also referred to as “scrambling”).

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Aucsmith; “Tamper Resistant Software: An Implementation”, Information Hiding: First International Workshop (Lecture Notes in Computer Science), vol. 1174, Ross Anderson, Editor, 1996, pp. 317-333.

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