Method and apparatus for increasing the speed of the detecting o

Details Method and apparatus for increasing the speed of the detecting o Method and apparatus for increasing the speed of the detecting o

1992-08-31

1995-12-05

Nguyen, Hoa T.

Cryptography

Key management

Having particular key generator

380 4, 395440, G06F 702, G06F 1540, H04L 900

Patent

active

054737699

ABSTRACT:
A method and apparatus for increasing the speed at which a computer can scan files for computer viruses examines the initial state information of each file and stores this state information in a cache. Since viruses generally add themselves to preexisting files, they generally change the lengths or other characteristics of the files. During a scan, current state information is gathered regarding the length and/or other characteristics of the current state of the file and this information is compared to the length and characteristics from the initial state of the file. If the initial state information is different than the current state information then the files are scanned for certain subsets of viruses which affect files in a manner which is determined by the differences in such initial and current state information.

REFERENCES:
patent: 5121345 (1992-06-01), Lentz
patent: 5278901 (1994-01-01), Shieh et al.
Hirst, "Getting inside PC viruses", Tech. PC user Journal vol.: V1, issue: Ng, p. 22(5), Puslished May 1989.

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