The computer network technology is developing rapidly, and the development of internet technology is more quickly, people more aware of the importance of the network security. Network security is main issue of computing because many types of attacks are increasing day by day. In mobile ad-hoc network the nodes are independent. Protecting computer and network security are critical issues. The malicious nodes create a problem in the network. This malicious nodes acts as selfishness, It can use the resources of other nodes and preserve the resources of its own. After analyzing and quantifying the network information security elements confidentiality, integrity and availability, this paper describes the network security confidentiality vector, network security integrity vector and network security availability vector;

Why Security?
• The Internet was initially designed for connectivity
– Trust assumed
– We do more with the Internet nowadays
– Security protocols are added on top of the TCP/IP
• Fundamental aspects of information must be protected
– Confidential data
– Employee information
– Business models
– Protect identity and resources
• We can’t keep ourselves isolated from the Internet
– Most business communications are done online
– We provide online services
– We get services from third-party organizations online

Types of Security
• Computer Security: generic name for the collection of tools designed to protect data and
to thwart hackers
• Network Security: measures to protect data during their transmission
• Internet Security: measures to protect data during their transmission over a collection
of interconnected networks


Access Control
• The ability to permit or deny the use of an object by a subject.
• It provides 3 essential services:
– Authentication (who can login)
– Authorization (what authorized users can do)
– Accountability (identifies what a user did)

• A means to verify or prove a user’s identity
• The term “user” may refer to:
– Person
– Application or process
– Machine or device
• Identification comes before authentication
– Provide username to establish user’s identity
• To prove identity, a user must present either of the following:
– What you know (passwords, passphrase, PIN)
– What you have (token, smart cards, passcodes, RFID)
– Who you are (biometrics such as fingerprints and iris scan, signature or

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