Computer security refers to protecting and securing computers and their related data, networks, software, hardware from unauthorized access, misuse, theft, information loss, and other security issues. The Internet has made our lives easier and has provided us with lots of advantages but it has also put our system’s security at risk of being infected by a virus, of being hacked, information theft, damage to the system, and much more.
●Three key objectives that are at the heart of computer security:
1.Confidentiality: Preserving authorized restrictions on information access and disclosure, including means for protecting personal privacy and proprietary information. A loss of confidentiality is the unauthorized disclosure of information. This term covers two related concepts:
●Data confidentiality: Assures that private or confidential information is not made available or disclosed to unauthorized individuals.
●Privacy: Assures that individuals controlor influence what information related to them may be collected and stored and by whom and to whom that information may be disclosed.
2.Integrity: Guarding against improper information modification or destruction, including ensuring information nonrepudiation and authenticity. A loss of integrity is the unauthorized modification or destruction of information.This term covers two related concepts:
●Data integrity: Assures that information (both stored and in transmitted packets) and programs are changed only in a specified and authorized manner.
●System integrity: Assures that a system performs its intended function in an unimpaired manner, free from deliberate or inadvertent unauthorized manipulation of the system.
3.Availability: Ensuring timely and reliable access to and use of information. A loss of availability is the disruption of access to or use of information or an information system .Assures that systems work promptly and service is not denied to authorized users.
