VIRUS COMPUTER DEFINITION

“a program that can infect other programs by modifying them to include a slight altered copy of self. A virus can spread throught a computer system or nework using the authorization of every user using it to infect their programs. Every programs that gets infected can also act as a virus tghat infection grows” (Fred Cohen)

The first time used the term virus in 1984 fred cohne dik United States. Computer virus called "virus" because it has some fundamental similarities of the virus in medical terms (biological viruses).Computer virus is a program of regular computers, but have fundamental differences with the virus in medical terms (biological viruses).Computer virus is a program of regular computers, but have fundamental differences with other programs, namely a virus designed to infect other programs, convert, manipulate and even broke. The virus will only be transmitted if a trigger program or programs that have been infected had been executed.Here are examples of classification of potentially dangerous programs (where virus included therein):1. Malware: stands for malicious software, refers to programs created with the objective harm or attack a computer system. Consists of computer virus (computer virus), computer worms, Trojan horses, joke programs and malicious toolkits.a. Computer viruses: refers to programs that have the ability to air its own replication.b. Computer worm: refers to an independent program that has the ability to application by itself. Independent in early have the meaning that the worm does not have a host program as a virus, to be boarded. Often worms are grouped as sub-class of computer viruses.c. Trojan Horse: refers to an independent program that can have functions that seem useful, and when in execution, unbeknownst to the user, also carry out destructive fungsi2.d. Malicious toolkits: refers to programs that are designed un tuk help create programs that can harm a computer virus. Examples of this type of program is a tool maker viruses and programs created to assist the process of hacking.e. Joke program: refers to replicate the program operations that could harm the computer system, but actually made for the purpose of a joke and does not contain any hazardous operations.