Virus detection system

Details Virus detection system Virus detection system

2007-08-21

2007-08-21

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

C713S189000, C726S024000

Reexamination Certificate

active

10243229

ABSTRACT:
A method of curing an encrypted computer virus present in a computer system includes analyzing encrypted data to determine at least one most frequently occurring encrypted byte in the encrypted data, calculating an encryption key based on the most frequently occurring encrypted byte and a corresponding expected original byte of original data and decrypting the encrypted data using the encryption key to restore the encrypted data to original data.

REFERENCES:
patent: 5442699 (1995-08-01), Arnold et al.
patent: 5485575 (1996-01-01), Chess et al.
patent: 5613002 (1997-03-01), Kephart et al.
patent: 5696822 (1997-12-01), Nachenberg
patent: 5765030 (1998-06-01), Nachenberg et al.
patent: 5809138 (1998-09-01), Netiv
patent: 5826013 (1998-10-01), Nachenberg
patent: 5854916 (1998-12-01), Nachenberg
patent: 5964889 (1999-10-01), Nachenberg
patent: 5999723 (1999-12-01), Nachenberg
patent: 6016546 (2000-01-01), Kephart et al.
patent: 6052780 (2000-04-01), Glover
patent: 6067410 (2000-05-01), Nachenberg
patent: 6081894 (2000-06-01), Mann
patent: 6185686 (2001-02-01), Glover
patent: 6357008 (2002-03-01), Nachenberg
patent: 6393568 (2002-05-01), Ranger et al.
patent: 6851057 (2005-02-01), Nachenberg
patent: 6971019 (2005-11-01), Nachenberg
patent: 6980992 (2005-12-01), Hursey et al.
patent: 6981141 (2005-12-01), Mahne et al.
Conan Doyle “The Dancing Men”, The Return of Sherlock Holmes, p. 16, Oct. 27, 2003.
C.S. Nachenberg, “A New Technique for Detecting Polymorphic Computer Viruses. A Thesis Submitted in Partial Satisfaction of the Requirements for the Degree Master of Science in Computer Science and Engineering”, Thesis University of California, 1995, pp. I-V, 1-127.
A. Menezes, P. Van Oorschot and S. Vanstone, “Handbook of Applied Cryptography”, 1997, pp. 245-249.
Army, Dept. of the;Monoalphabetic Unilateral Substitution Systems Using Standard Cipher Alphabets; Field Manual, No. 34-40-2 Hdqtrs; Washington, DC; pp. 3-1-3-10 (Basic Cryptanalysis—pp. 2); Sep. 13, 1990.

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