Security+problems

=Network and Data Security=

As soon as you are connected to a network you have to think about security. If an unauthorised person gains acess to a computer they can cause very serious problems. People who do this are called **Hackers.** The most common way of securing you network is to give each user a You can also have **firewalls**. A **firewall** is something that is between your computer/LAN and your internet/WAN. It prevents hackers gaining acess to your computer.
 * User ID - A unique name that each person has
 * Password - A random combination of lowercase letters, uppercase letters, numbers and symbols.

Physical Security
Some people try to gain physical acess to your computers. They are also known as hackers. To prevent peope doing this you can
 * Have security guards
 * Keep doors and windows locked
 * Use ID cards and fingerprint scanners
 * Use CCTV cameras

Data Security
The protection of data is importart because it costs lots of time and money. If the data is hacked it can sometimes cause lots of serious problems. Some commonn ways to protect your data are to
 * Use antivirus software[[image:http://www.rocketvox.com/wp/wp-content/uploads/2008/11/525px-public_key_encryption.png width="323" height="290" align="right"]]
 * Backup data
 * Encryption

Encryption
Encryption is when a special software is used to make the information into jumbled numbers and letters. For example if you want to send a file to your friend you
 * 1) Generate a **KEY-- a long combination of numbers**
 * 2) Give a copy of the key to your friend using a Memory stick or a floppy disk
 * 3) Encrypt the data using a special software
 * 4) Send the file to your friend us in the Internet
 * 5) Your friend decrypts the file usin the key and special software
 * Even if the hacker gets the data he cant read the information because he doesnt have the key.**
 * Encryption is only useful when you have to use the internet.**