We all have heard the terms Virus,Worms,trojans and spyware but only a few of us know the difference between them. We generally consider everything that is detected by an antivirus as virus but this is not the case.The antivirus not only provides protection against viruses but it also protects us from trojans,worms and spywares. All these can be harmful to your computer hardware and software. Today I will differentiate all these terms from each other .
Okay let me start now.
Virus:- Virus is a self replicating program that attaches itself to an executable file.When the file is executed the virus automatically gets executed and enters into system memory .Once it enters into system memory it either searches for other files that can be infected or stays in the background and infect the files that are uses the virus infected program.
Worms:Worms are very similar to viruses but differ in way that they donot bind themselves to executable files instead to replicate themselves they uses the network.If you find excessive use of your network bandwidth then you may be infected by a worm.So,a worm donot require a user to execute any file for its execution it can work without user intervention.
Trojan Horse:A trojan horse is harmful program which may seem harmless to the user before its installation but instead it is programmed or reverse engineered to facilitate unauthorised remote access to the computer.Trojan’s donot replicate themselves.
Spyware:A spyware is a program that secretly monitors and collects pieces of information.They usually run in stealth mode and cannot be detected easily.
Keyloggers are a great example of spyware software.There are not limited to just spying but can also send data to remote computers.
Let me tell you what are keyloggers. They are spying tool which note down your every keystrokes. These are used to know user's passwords and get hold on bank accounts of people. For example when you will fill info in your account, like:
Username-blabla@bla.com
Password-*************
The each and every key you pressed is noted down in a notepad somewhere in your drive and hence your password too. Some keyloggers mail that notepad to the person who installed that without letting you know. Some cybercafes use these tools to know your bank account number. This is the reason why cyber cafe's are not a right place for making transactions online.
Solution: A Good Antivirus(Click HERE for some good & free Antivirus) can detect all easily so install it, Update it regularly and then you can remain tension free:)
NOTE: This info was Solely for EDUCATIONAL Purpose.
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