Downs_C7_A1 - CHAPTER 1 COMPUTER VIRUSES The computer virus...

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CHAPTER 1: COMPUTER VIRUSES The computer virus is one of the most familiar forms of risk to computer security. A computer virus is a program written by a hacker or a cracker, designed to perform some kind of trick upon an unsuspecting victim’s computer. In some cases, the trick performed is mild, such as drawing an offensive image on the victim’s screen or changing all of the characters in a document to another language. Sometimes the trick is much more severe, such as reformatting the hard drive and erasing all the data or damaging the computer’s motherboard so that it cannot operate properly. TYPES OF VIRUSES Viruses can be categorized by their effects, which include being a nuisance, destroying data, facilitating espionage, and destroying hardware. A nuisance virus usually does no significant damage but is an inconvenience. The most difficult part of a computer to replace is the data on the hard drive. The installed programs, documents, databases, and saved emails form the heart of a personal computer. A data-destructive virus is designed to destroy this data. Some viruses are designed to create a backdoor into a system to bypass security. Called espionage viruses, they do no damage but allow a hacker to enter the system later for the purpose of stealing data or spying on the work of the competitor. Very rarely, a virus is created to damage the hardware of the computer system itself. Called hardware-destructive viruses, these bits of programming can weaken or destroy chips, drives, and other components. Update METHODS OF VIRUS OPERATION Viruses operate and are transmitted in a variety of ways. An email virus is normally transmitted as an attachment to a message sent over the Internet. Email viruses require the victim to click on the
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  • Spring '16
  • Ms. Jennifer Cozart
  • hard drive, Computer virus, Boot sector

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