What is computer security?

Computer security is protection given to an automated imformation system in order to obtain the applicable objectives of preserving the integrity, availability and confidentiality of information system resource like hardware, software, firmware, data and telecommunication.

Computer security is nothing but to provide security to data, computer systems, services and supporting procedure.

Information security and information assurance, which focuses on the security process not on the hardware and software being used but on the data that is processed by them. Assurance also introduces the availability of the systems and information when we want them.

Data security is related to the content of information and source of the data transfer should be secure. Only valid users can access or change the data. Data should be secured from modification, insertion, deletion or reply from unauthorised person.