Viruses

... , public switched telephone networks or other sources. These attacks generally target known security vulnerabilities of systems. Many of these vulnerabilities are simply due to configuration errors. Malicious Code Viruses and worms are related classes of malicious code; as a result they are often confused. Both share the primary objective of replication. However, they are distinctly different with ... anti-virus software, rely on a great deal of a prior knowledge about the viral code. Scanners search for "signature strings" or use algorithmic detection methods to identify known viruses....

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... programs. Once the infected program is run, the virus is transferred to your system's memory and may replicate itself further" (Types of Viruses 1). The macro viruses are the most common because they infect files run by applications that use macro languages (Microsoft Word or Excel). The look like any ... other macro in the file, but when the file is opened, the virus executes commands understood by the macro language. Macro viruses can exist inside any document whose application uses a macro language, such as the Melissa of a few years ago. Melissa was passed on through Microsoft ... un...

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... what is currently being done to prevent more computer virus spreads. When did it all begin? In the year 1986, which was the year when one of the first computer viruses was created in Pakistan. The first Virus was "known as the Brain Virus- the virus was known to "occupy unused space on the disk so that it could not be ... dozens of people in the victim's e-mail address book- (http://computer.howstuffworks.com/virus1.htm). Trojan horses on the other hand, are "A destructive program that masquerades as a benign application. Unlike viruses, Trojan horses do not replicate themselves but the...

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• Grade Level: High School

... , or a computer locks up, a virus is to blame for the problem. Unknowingly, e-mail addresses can be affected and even used for reproduction by viruses. (Trusts and Estates, 12-13) The common term "computer virus" is actually a generic term used to describe all computer infections. A true computer ... to PestPatrol, a virus research center, the virus problem began in 1985 when the first computer virus was detected. In 1995 the estimated number of viruses had risen to 8,000, just 10 years after the first virus was detected (fig. 1). As the Internet and World Wide Web became widespread, .....

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... of viral replication is called the Lysogenic Cycle, which is the replication process in which a virus does not immediately kill a host cell. When viruses replicate, they have nothing to do with Meiosis or Mitosis unlike most organisms that reproduce Sexually and Asexually. 6-Organisms grow and develop. To grow ... to their environments through evolution. Adaptations enable organisms to survive in changing environments. The adaptations are passed from parent to offspring, but with viruses there are no offspring. Viruses can be harmful. If a virus is disease causing, it's called Virulent. ...

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... programmers saw this idea of being able to shut off several computers with one program appealing and in the following ten years hundreds of computer viruses were written causing widespread damage. The most targeted computers were large company systems storing important data on them. A virus could cost these companies ... not technically a virus, as it does not require a host. It can replicate itself without requiring a program to initiallly execute it. Worms and viruses have become such a large threat mainly because of the internet. The first large scale problem with worms was in 1987 ...

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... of technology and have there name spread or virus spread over the news worldwide. Anyway, these virus creators apply slight variations to their original viruses to make them undetectable by antivirus programs. The result is a related virus. The makers of antivirus software must then update their checking programs ... virus is if the computer is started from the infected disk. Another common virus, which is a newer virus called a macro. These types of viruses take the form of a spreadsheet or word-processing program and are executed as the user works with these programs. Some common attri...

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... . This will be discussed in more detail later in the essay, but first the molecular biology of WNV pertaining to host specificity will be argued. At the molecular level these viruses are engineered in a way that loosely directs them toward a particular host. The hosts provide the essentials for survival, like permissiveness, replication and cellular machinery for propagating virion (6). More simply, ... there are special mechanisms that promote infection, spreading and persistence. The focus here will be on one of these minor yet essential molecular factors that promotes specificity. Lik...

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... using regularly updated anti-virus programmes, knowing the identity of the external sources from which data is received and generally being aware of the latest viruses. Whenever a file is opened at a computer, the user should know the identity of the sender from which they can judge wether this ... cheapest way of regularly updating an anti-virus programme is by frequently downloading the update from the internet. Of course the best protection from viruses is to have no contact with any external sources, but in today's fast technological world no one can afford that option. To ensure .....

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... virus is a relatively small program that attaches itself to data and program files before it delivers its malicious act. There are many distinct types of viruses and each one has a unique characteristic. Viruses are broken up into to main classes, file infectors and system or boot-record infectors. A file infector attaches to ordinary programs usually affecting .COM and .EXE files. These two ... other spectrum, system or boot-record infectors infect executable codes found in certain system areas on a disk, which are not ordinary files. Not only are there two main classes of viruses, but...

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• Grade Level: High School