Computer security is an important part of computer technology, and encompasses security of networks and computers. The purpose of this security is to protect the information from theft, natural disasters and corruption while making it available to its intended users.
Computer security can be administered in different ways. 'Security by design' involves designing the computer programs with security. Implementing security by design usually limits some of the functions and abilities of the program. But it also secures all information and processes. The methods to impose design security are diverse.
'Security by architecture' is defined as security imposed by the secure positioning of security controls. These security controls ensure the upkeep of availability, accountability, confidentiality and integrity of important information. Hardware security relies on the equipment used rather than the security of the software. For instance, dongles are considered more secure because of the method used to access them.
Popular terminology in computer security:
Authentication: This ensures the users on both ends of the communication are stating their genuine identity.
Access control lists: These lists give different privileges and access to specific control lists.
Anti-virus: These are software's designed to find, destroy and prevent viruses and other corrupted programs from entering your system and gaining access to it.
Cryptographic techniques: These techniques encode data when it is being transmitted between systems ensuring security.
Firewalls: Firewalls are devices that provide or deny access according to established regulations.
Information back up: This is a way of protecting information from being lost by creating copies. It is important that these copies are stored as securely as the original. | 
