Nowadays computer security is becoming of a greater concern everyday. As computers penetrate to all spheres of our business, social, and informational life, the dependence upon their stable and secure work increases from day to day. But even though that much had been thought, introduced and used to insure computer security, the armor of every computer system has holes. System administrators may constantly insure and improve the security of the systems, but there will always be some ways to pass and avoid it. People in majority reason in the similar way and in the similar way they also act. So what one man had invented will once come to the mind of some one else, and things once hidden will be found.

The problem of computer security is number one problem in nowadays networks and Internet engineering. The computer attacks of viruses, Trojan horses, worms and other software engineered by computer crackers causes a lot of damage to personally used computers, computer networks, and banking systems. The damage made by computer attacks appears to be 100 billions dollars every year just in the USA.

As it`s well known Trojan horses and different kinds of viruses or worms cause the biggest damage.

As hackers use different means to crack the security systems it often happens to be impossible to resist and computer security system fail. The computer attacks made by hackers are not simple virus attacks, but they usually combine all existing meanings to destroy the security. The case that happened with Axiom Corporation is a good proof of it.

Florida resident was arrested, being accused in a big theft of personal data. The case, against Scott Levine, 45, represents