1.4 - Network Security

Malicious software that is designed to disrupt, damage or gain unauthorised access to a computer system.

Viruses, Worms, Trojan Horses

Malware that replicates code in other programs, before deleting, corrupting or modifying files.

Malware that replicates itself in order to spread to other computers, so that it can slow down networks and computers.

Malware that pretends to be legitimate software, but has the purpose of causing damage, or gaining unauthorized access to a computer system.

Malware that holds a computer hostage (by locking/encrypting it) until money is paid.

Unpatched software; out-of-date anti-malware

The ability to obtain confidential information by asking people for it

The fraudulent practice of sending emails, pretending to be from a reputable company, but the aim is to try and get users to reveal their confidential information.

Automated software used to generate and test every combination of password.

Flooding a server with useless traffic, to make the server overloaded and unavailable.

The unauthorised act of stealing computer-based information from the victim, the aim is to obtain personal information.

Data records can be modified or added by inserting additional code into an input box.

Penetration testing Anti-malware software Firewalls User access levels Strong passwords Encryption Physical security

Trying to break into a network to try to find security holes (identify possible entry points) in your own system, so they can be fixed.

Detect and remove malware from a computer system.

A barrier separating two networks. The barrier prevents unauthorised access to a network.