The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2008
Filed:
Jun. 27, 2002
Applicants:
Pavel Zeman, Kirkland, WA (US);
Michael D. Marr, Sammamish, WA (US);
Inventors:
Pavel Zeman, Kirkland, WA (US);
Michael D. Marr, Sammamish, WA (US);
Assignee:
Microsoft Corporation, Redmond, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/00 (2006.01); G06F 12/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A technique for obfuscating code. A list of one-byte instructions for a particular processor is created. Bytes in a function to be obfuscated are randomly selected, and these bytes are replaced with one-byte instructions from the list. A table that identifies the replaced bytes and their original values is inserted into the executable that contains the function. When the function is called, the function is deobfuscated by consulting the table to restore the replaced bytes to their original values.