INTRODUCTION ABOUT COMPUTER SECURITY & CYBER SECURITY

What is Computer Security?

Computer Security is the protection of computing systems and the data that they store or access.

In a generic sense, security is "freedom from risk or danger." In the context of computer science, security is the prevention of, or protection against,

Access to information by unauthorized recipients, and intentional but unauthorized destruction or alteration of that information1

This can be re-stated: "Security is the ability of a system to protect information and system resources with respect to confidentiality and integrity." Note that the scope of this second definition includes system resources, which include CPUs, disks, and programs, in addition to information.

Component Security :-

Computer security is frequently associated with three core areas, which can be conveniently summarized by the acronym "CIA":

Confidentiality -- Ensuring that information is not accessed by unauthorized persons

Integrity -- Ensuring that information is not altered by unauthorized persons in a way that is not detectable by authorized users

Authentication -- Ensuring that users are the persons they claim to be

Computer security is not restricted to these three broad concepts. Additional ideas that are often considered part of the taxonomy of computer security include:

Access control -- Ensuring that users access only those resources and services that they are entitled to access and that qualified users are not denied access to services that they legitimately expect to receive.

Nonrepudiation -- Ensuring that the originators of messages cannot deny that they in fact sent the messages2

Availability -- Ensuring that a system is operational and functional at a given moment, usually provided through redundancy; loss of availability is often referred to as "denial-of-service"

Privacy -- Ensuring that individuals maintain the right to control what information is collected about them, how it is used, who has used it, who maintains it, and what purpose it is used for

What is Cyber Security?

Cyber security, also referred to as information technology security, focuses on protecting computers, networks, programs and data from unintended or unauthorized access, change or destruction.