6. The method of claim 5 , further comprising the step of: determining, at the computer system, whether the extracted representative pattern of a predetermined length from the initial executable file is already a member of the membership signature.
6. The method of claim 5 , further comprising the step of: determining, at the computer system, whether the extracted representative pattern of a predetermined length from the initial executable file is already a member of the membership signature. 7. The method of claim 6 , wherein the extracted representative pattern is not of a predetermined length but is of an arbitrary length.