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:
Jan. 16, 1996
Filed:
Nov. 21, 1994
David M Chess, Mohegan Lake, NY (US);
Jeffrey O Kephart, Yorktown Heights, NY (US);
Gregory B Sorkin, New York, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Information pertaining to the verification of the identity of, and reversal of, a transformation of computer data is derived automatically based on a set of samples. The most important class of transformations is computer viruses. The process extracts this information for a large, fairly general class of viruses. Samples consisting of host programs infected with the virus and sample pairs consisting of an infected host and the corresponding original, uninfected host are obtained. A description of how the virus attaches to the host program, including locations within uninfected host of components of both the original host and the virus is generated. Viral code is matched across samples to obtain a description of 'invariant' regions of the virus. Host bytes embedded within the virus are located. A description of the original host locations permits ant-virus software on a user's machine to restore the bulk of a program that has been infected. Characterization of the correspondence between invariable portions of the virus and destroyed parts of the host enables anti-virus software to complete the repair.