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Submitted by heythere189 on 06/30/2008 05:21 PM
Computer Viruses
Viruses, a Computers Worst Enemy!
Everyone knows that with computers comes viruses, but how many people actually know what that means? It was said by E.H. Spafford that "The only truly secure system is one that is powered off, cast in a lead-lined room with armed guards and even then I have my doubts." Was he right? We will leave that for you to decide. Computer viruses have affected society and the security of personal computers. A virus is a code that gets put into your computer by hackers to steal data from your computer and to break down the components that make your computer work. There are literally hundreds of viruses circulating for personal computers and many anti-viral packages that claim to remove the codes from your computer. Some viruses are polymorphic; that is, they change with each infection in an attempt to avoid detection by anti-virus programs. As quickly as someone writes an anti-virus program, someone else writes a new virus that hides more successfully than in the past.
Due to the harshness of some viruses; people have devised methods of detecting and removing them. The anti-viral programs will scan the entire hard drive looking for evidence that viruses may have infected it. These programs must be told very specifically what to look for on the hard drive. There are two main methods of detecting viruses on a computer.
The first is to compare all of the viruses on the hard disk to known types of viruses. While this method is very accurate, it can totally useless when dealing with a new and previously unknown virus. The other method is the way in which a common cloning virus adapts. All that a cloning virus really does is look at what operations the computer is executing and reacts and adapts to them by making more copies of it. This is the serious mistake with cloning viruses: all the copies of itself look the same. Basically all data in a computer is stored in a byte structure format. These bytes, which are...
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