Method for securing software via late stage processor...

Details Method for securing software via late stage processor... Method for securing software via late stage processor...

2006-05-02

2006-05-02

Song, Hosuk (Department: 2135)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

C713S190000, C713S193000

Reexamination Certificate

active

07039814

ABSTRACT:
Embodiments of the present invention disclose a method and system for protecting the security of encrypted software. Specifically, the present invention pertains to a method of decrypting only those steps or portions of the software that are written to a processor's internal instruction cache. While in storage in non-volatile memory and in RAM, encrypted software remains in an encrypted state. The invention includes a decryption unit that may be located internal to the processor and performs decryption of the software as it enters the instruction cache. By use of this method, encrypted software is resistant to copying from RAM in a decrypted state for subsequent reverse engineering. Software that is protected by this method could be any intellectual property meant to processed by computer that is delivered to the user by internet, cable, direct satellite, packaged media, or any other means.

REFERENCES:
patent: 4465901 (1984-08-01), Best
patent: 5278905 (1994-01-01), McNair
patent: 5392351 (1995-02-01), Hasebe et al.
patent: 5982887 (1999-11-01), Hirotani
patent: 6408387 (2002-06-01), Wells
patent: 6446050 (2002-09-01), Kondo et al.

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