Introduction | Network Security | Cryptography and Network Security
Introduction | Network Security | Cryptography and Network Security
Network Security
Network security is the security provided to a network from unauthorized access and risks. It is the duty of network administrators to adopt preventive measures to protect their networks from potential security threats.
Computer networks that are involved in regular transactions and communication within the government, individuals, or business require security.
The protection afforded to an automated information system in order to attain the applicable objectives of preserving the integrity, availability, and confidentiality of information system resources.
This definition introduces three key objectives that are at the heart of computer security:
• Confidentiality: 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 control or influence what information related to them may be collected and stored and by whom and to whom that information may be disclosed.
• Integrity: This term covers two related concepts:
Data integrity: Assures that information 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.
• Availability: Assures that systems work promptly and service is not denied to authorized users.
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