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Cryptography and Network Security by S. Bose, Ajay Kumar

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Chapter 16

System Security

Computer system security is the field of study about techniques for achieving and maintaining secure state, where only the authorized users are allowed to use the system and its resources, neither misusing nor disturbing the system operation. In this chapter, we shall discuss on different techniques such as password management, program security, Operating System (OS) security, network security and Database (DB) security.

16.1 PASSWORD

A password is a word or string of characters used for user authentication to approve access to a secured resource. Password usages are known to be ancient. Sentries would challenge those who are wishing to enter an area or approaching it to supply a secret word or code word and would ...

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