Today, some people can access any top secret facility via the Internet. In the US Army, for example, almost everything is run by computers, from the payment of soldiers' salaries to the guiding of strategic missiles and transmission of takeoff commands for strategic bombers. This is why the US Defence Ministry has issued a secret instruction to temporarily disconnect all military computers from the Internet. It is almost impossible to find a person seriously engaged in computer espionage. The most difficult task to penetrate somebody's computer network is to find a key to override the safety system, to guess the password.
Professionals spend a lot of money creating the so-called master key programmes.
Amateurs mostly rely on luck and chance. More than 90 per cent of passwords are just some words from the user's mother tongue. We can identify them just by trying words one after another. The number of words in any language does not exceed 100,000. Along with his friends he helped the Yugoslavs with information warfare during the Balkans war.