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S

Shareware

Software that is distributed through sharing, which is encouraged. Usage is usually requested as a donation to the author(s).

Signature

The content of a definition. A signature is a unique identifier for an infection which allows the scanner to determine whether a file is infected.

social engineering

Social Engineering-In computer security, social engineering is a term that describes a non-technical kind of intrusion that relies heavily on human interaction and often involves tricking other people to break normal security procedures.

social networking sites

Social Networking Sites-A "social network site" is a category of websites with profiles, semi-persistent public commentary on the profile, and a public social network displayed in relation to the profile. Examples of social network sites are Facebook.com and Myspace.com. These sites are frequently targeted by hackers who employ social engineering tactics.

Spoof, spoofed

To pretend to be something. A spoofed email is one that pretends to be from a source other than its true source. A spoofed webpage is one that appears to be something other than what it is.  Spoofing is common in phishing scams

spyware

Spyware-Any software that covertly gathers user information through the user's Internet connection without his or her knowledge, usually for advertising purposes. Spyware applications are typically bundled as a hidden component of freeware or shareware programs that can be downloaded from the Internet. Once installed, the spyware monitors user activity on the Internet and transmits that information in the background to someone else. Spyware can also gather information about e-mail addresses and even passwords and credit card numbers.

spyware cookie

Spyware Cookie-A cookie small file that is created by a webpage and stores information. A spyware cookie is  malicious. It stores information such as browsing habits and personal information and reports this information to other companies for the purposes of advertising, without your knowledge or consent.