WHAT IS ANTIVIRUS
Anti Virus:-
it is interesting to node that the arrive of the computer virus generate a whole cub-industry of software development concentrating on providing software antivirus tool to the user . it is also interesting to node that most user prefer to think that it is the antivirus guys whole themselves crate and release viruses. After all, a
in fact, most antivirus personnel know perfectly how harmful a virus is,and the potential for damage involved ,and would refrain from doing any such thing,However industry has its black sheep and it is indeed possible that all antivirus personnel may not have the same high moral standard ,Most antivirus personnel have accumulated may not specialized knowledge about antivirus .So they admittedly have the knowledge to churn out highly complicated virus.
What is antivirus software designed to do?
What exactly is antivirus software designed to do? We’re talking about a program or umbrella of programs whose purpose is to scan for and eradicate computer viruses and other malicious software, also known as malware. Antivirus software is a vital component of your overall online and computer security strategy in its protection against data and security breaches along with other threats.
Free antivirus software: Does it work?
Another common question is whether free antivirus software protects us. But is anything ever really free? “Free” antivirus inevitably supports and makes money with advertising and tracking, and by installing junkware.
Free downloads also can hide malware. If you go this route, only download software from sites that you absolutely trust. You also must ensure that your security setting is set high enough to detect malicious codes.
Another thing to keep in mind when considering whether to rely on free antivirus protection? Identity theft protection, mobile security, and data security support options. These important security features often are lacking with free software.
PREVENTERS AND CHECK-SUMMERS:-
one category of antivirus program deals with preventing the virus from entering the system . The notion is that if that if the system can not be infected ,virus will never spread .These preventor work either by scanning for specific viruses signature during program execution or by looking for virus like behavior . While the benefit of having a preventor is unquestionable ..
Most of the antivirus package come along with a prevention program that is cable of defecting the virus before the system infected . for ex:-Na-shot Antivirus package comes with the "NashMen" prevent-or.
Checksummer are used to report the change in content of executable file in the system.When a new virus infect the system ,it has to necessarily make modification either to the system area(boot/partition sector) or to the executable files present in the system. The checksummer keeps track of a checksum or CRC(cyclic Redundancy Check) associate with each exe file and informs the user when a change happen.
SCANNERS:-
scanners program check for the presence of virus signature either in memory of program file and can tell you if your system in infected or not. Most scanner perform both a memory and a file scan .Scanners do not remove virus ,they merely report the presence of the infection.As a result ,some antivirus companies give away their scanning software as freeware ,so that the user would be able to evaluate the product ,Of course ,if you want to remove an infection ,you will have to boy the product.
Most scanner merely check for the presence of the virus signature in the files .Some scanner also include heuristic scanning -which is also capable of ducting most new viruses .However ,all scanner which support the heuristic method of scanning also pop up a warning message about possible midsection.
REMOVERS:-
if any computer system is affected by virus then there are remedies to wash off the virus .These are special computer program or software which are used to detected virus by scanning the whole system ,and later repairing it by removing the viruses .These are called anti virus program.
the most popular antivirus program is NORTAN ANTI VIRUS or NAV in short.
it is a very powerfull software which can detect and remove almost every kind of computer virus. it can also check the virus from the internet through e-mail.if this anti virus is executeed with the booting and kept remains executing till the computer is on, it check the virus from being executed as and when a file a recevied .it filter all incoming file through e-mail to stop them entering computer system.
TROJAN:-
A Trojan horse or Trojan is a type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems. Once activated, Trojans can enable cyber-criminals to spy on you, steal your sensitive data, and gain backdoor access to your system. These actions can include:
- ⇨Deleting data
- ⇨Blocking data
- ⇨Modifying data
- ⇨Copying data
zombies:-
They are program that isntall themselves on computers are remain dormant until some event them into action .The action could include corrupting,truncating ,or stealing your info and sending it to a predefined email account or opening up remote control access ports
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SHIVANSHU TIWARI
