Method and device for detecting one or more known character strings in a collection of characters

Abstract

Abstract Method for detecting the presence of one or more search strings in a collection of characters which is to be searched, wherein a specific combination of characters from each search string is stored in a memory. From the collection of characters to be searched, combinations of a similar type are formed in windows and are then compared with the first-mentioned combinations. In the event of a correspondence between a first-mentioned combination and a last-mentioned combination, a code signal is emitted to carry out a more precise check for correspondence between the search string and the relevant part from the collection of characters to be searched. The method is highly suitable for the fast detection of computer viruses of which an identification string is known. A database can also be efficiently searched in this way for the occurrence of various search terms. <IMAGE>

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