Security is a major concern for many users of the Internet.
There are two aspects to security, firstly, the vulnerability of computers on the Internet to unauthorised access. This is a real concern as there are hackers whose sole intent is to break into networked computer. Hackers are usually not malicious, and simply view computer security systems as a challenge. However, there are malicious hackers who will break into a computer system with the aim of stealing, deleting or replacing information. It is important that computers on the Internet are configured and protected appropriately to minimise the risks of hacking.