System Security

Programs that have been installed without the user's knowledge.

Purpose: To cause harm to the computer or spyware to gain personal information such as passwords.

How to Prevent

Anti-virus software

Install Windows security updates

Update iOS updates

A trial-and-error method used to obtain information such as user password or PIN number.

Automated software is used to generate a large number of consecutive guesses.

Purpose: To cause harm to the computer or spyware to gain personal information such as passwords.

How to Prevent:

Anti-virus software

Install Windows security updates

Update iOS updates

Unusually slow network performance 

Unavailability of a particular web

How to Prevent:

Purchase a lot of bandwidth and extra servers to cope with increased traffic during DoS

Use D0S protection technologies offered by firewall companies

Involves 'sniffing' network traffic.

With a simple packet sniffer, an attacker can easily read all plaintext traffic.

How to Prevent:

Encryption is required so that the data cannot be read.

WPA2 encrypts Wifi so data can't be read when travelling on network.

Attackers can enter SQL commands into a web page input form to find out usernames and passwords.

How to Prevent:

Developers restrict user input

Developers that create the input forms need to restrict what the user can and can't enter.