Spyware

Spyware is a software that collects personal information about users without their informed consent.It is often used interchangeably with adware and malware.

Personal information is secretly recorded by means of various techniques like logging keystrokes,recording Internet web browsing history,and scanning documents on the computer's hard disk.

Unlike viruses and worms,spyware does not usually self-replicate.Spyware by design exploits infected computers for commercial gain.Typical tactics include delivery of unsolicted pop-up advertisements,theft of personal information including financial information such as credit card numbers,routing of HTTP requests to advertising sites.

Most spyware is installed without users being aware.Spyware can come bundles with shareware or other downloadable software,as wel as music Cds.The user downloads a program and installs it,and the installer additionally installs the spyware.Although the desirable software itself may do no harm,the bundles spyware does.

As the spyware threat has worsened,a number of techniques have emerged to counteract it.These include programs designed to remove or to block spyware,as well as various user practices which reduce the chance of getting spyware on a system.Major anti-virus firms such as Symantec,McAfee and Sophos have come,adding snti-spyware features to their existing anti-virus products.

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