A Web site uses cookies to identify users who visit the site, and also track the preferences of the users.

A filter that blocks unreliable and unauthorized information from the Internet before it reaches your computer or a private network. It provides additional protection against threats such as hackers and viruses. A firewall also helps to ensure computer privacy by restricting external access by any unauthorized user.

A person who uses computer expertise to gain unauthorized access to a computer, and then misuses or tampers the programs and data stored on the computer.

Any information available on the Internet is an intellectual property, which is legally owned by the person who created it. The owner of an intellectual property has the exclusive rights to control the use of this information.

An individual who develops contact with Internet users, through chat rooms, online forums, or e-mail, to exploit them financially or involve them in dangerous relationships.

A unique string of characters that a user types in as an identification code. It is a security measure used to restrict access to computer systems and sensitive files.

The act of extracting personal information, such as passwords and credit card details, from computer users and then use the information for malicious purposes.

A sudden increase in line voltage, which may lead to the damage of electronic devices, such as computers.

An Internet security protocol that ensures secure data communication by encrypting the information transmitted. The SSL protocol certifies that a Web site is genuine and ensures that the data provided to the site is not misused.

Verbal defamation. Slander is a punishable offense.

Unauthorized copying of copyrighted software without obtaining the license or permission of its copyright owner is software piracy.

An irrelevant and unsolicited e-mail message sent by an unknown sender. A spam is sent to distribute a message to many recipients at one time.

A computer program that is installed on your computer without your knowledge. Spyware can secretly send out information about your Web browsing habits or other personal details to another computer through the network.

A destructive computer program disguised as a game, utility, or software. When run, a Trojan horse does something harmful to the computer system while appearing to do something useful.

The name by which a user is identified to a computer system or network. To access a computer protected by username and password, a user needs to enter the correct combination of username and password.

A computer program that is designed to cause malfunctioning of a computer or damage the data stored on the computer.

A computer program that propagates itself across computers, usually by creating copies of itself in each computer's memory. A worm might duplicate itself in one computer so often that it causes the computer to crash.