Abstract: | Just as graffiti has been around for as long as humans have been capable of written communication, malicious mobile code has existed for as long as humans have mastered digital communication. It is only in the last few years that viruses and worms have become worthy of mainstream media attention. The first notable instance was the ‘Apple Virus’ that broke out in 1981. By 1986, one of the first PC based viruses — ‘The Brain’ — had been created. |