Computer Security

A set of program instructions that attaches itself to a file, reproduces itself, and spreads to other files on the same computer

• Malware
• Computer virus
• Computer worm
• Trojan Horse

A computer program that seems to perform one function while actually doing something else

• Malware
• Computer virus
• Computer worm
• Trojan Horse

Any program that is designed to enter a computer without notice and disrupt its normal operations

• Malware
• Computer virus
• Computer worm
• Trojan Horse

A self-copying program that spreads copies of itself from computer to computer

• Malware

• Computer virus

• Computer worm

• Trojan Horse

How does a computer virus infect a pc?

• Email attachments
• Attached to files on memory sticks
• Suspicious web links
• All of the above

What can a virus do to your computer?

• Delete files

• Cause inappropriate adverts to appear

• Spy on what you are doing

• Steal your information

How can you protect your computer against viruses?

• Put a lock on it.
• Install an anti-virus package, scan and delete files and update it.

How does a worm infect a computer?

• E-mail attachments
• Through security loopholes, your computer is not up to date
• Suspicious web links
• On memory sticks

What is the difference between a virus and a worm?

• A virus needs human intervention, a worm doesn't
• A virus deletes files, whereas a worm doesn't.

What is adware?

• Causes adverts to appear
• Deletes files