Antivirus Software & Its Origin
The antivirus born as a simple tool whose purpose was to detect and remove computer viruses, during
the late 1980s. Over time, the emergence of more advanced operating systems on the internet ,
antivirus have evolved into more advanced programs that not only seek to detect a computer virus ,
but also block it to prevent an infection by them, as well as are currently capable of recognize other
types of malware , such as spyware , rootkits , etc.
FUNCTIONING OF ANTIVIRUSES
The operation of an antivirus varies from one to another, although its normal behavior is based on
having a list of known viruses and their ways of recognizing them (so-called signatures or vaccines),
and analyzing against that list the files stored or transmitted from and towards a computer. Additionally,
many of today's Antiviruses have incorporated proactive detection functions, which are not based on a
list of known malware, but rather analyze the behavior of files or communications to detect which ones
are potentially harmful to the computer, with techniques such as Heuristics, HIPS, etc.
Usually, an antivirus has one (or more) memory- resident component that is responsible for analyzing
and verifying all open, created, modified, executed and transmitted files in real time , that is, while the
computer is in use. They also have a low-demand analysis component (the well-known scanners,
explorers, etc.), and e-mail, Internet protection modules, etc. The primary objective of any current
antivirus is to detect as many computer threats that can affect a computer and block them before it can
infect a computer, or be able to eliminate it after infection.
Over time, the Internet has made Antivirus Software evolve into more advanced programs that not only
seek to detect computer viruses, but also block them, disinfect them and prevent their infection, and
now they are capable of recognizing other types of malware, such as spyware ,root kids, etc.