Electrical computers and digital processing systems: support – Computer program modification detection by cryptography
Reexamination Certificate
2005-01-18
2009-08-18
Dada, Beemnet W (Department: 2435)
Electrical computers and digital processing systems: support
Computer program modification detection by cryptography
C713S165000, C713S168000, C713S176000, C713S188000, C726S024000, C711S216000, C717S126000, C717S168000, C717S169000, C717S172000, C717S173000, C717S174000, C717S175000, C717S177000, C717S178000
Reexamination Certificate
active
07577848
ABSTRACT:
Systems and methods for validating integrity of an executable file are described. In one aspect, multiple partial image hashes are generated, the combination of which represent a digest of an entire executable file. Subsequent to loading the executable file on a computing device, a request to page a portion of the executable file into memory for execution is intercepted. Responsive to intercepting the request, and prior to paging the portion into memory for execution, a validation hash of the portion is computed. The validation hash is compared to a partial hash of the multiple partial image hashes to determine code integrity of the portion. The partial hash represents a same code segment as the portion.
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Microsoft Cabinet module, http://svn.navi.cx/gnupdate/branches/libcomprex/glib-rewrite/modules/archive/cab/cab.h, copyright © 1999-2004 The GNUpdate Project.
EPO Communication with Search Report dated May 2006, from counterpart EP patent application, European Patent Application No. 05112610.0, 3 pages.
Hallin Philip Joseph
Schwartz Jonathan D.
Sie Yu Lin
Dada Beemnet W
Lee & Hayes PLLC
Microsoft Corporation
Shan April Y
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