ABSTRACT:
Network security is the effort to create a secure computing platform, designed so that agents (user/programs) cannot perform action that they are not allowed to perform. But can perform the action that they are not allowed to. The action in question can be reduced to operations of access, modification and deletion. A network has been defined as “any set of interlinking lines resembling a net”. Network can be seen as a subfield of engineering which looks at broader security an issue in addition to network security. This network security also deals with the problems of legitimate messages being captured and replayed. And with the people trying to deny that they sent certain messages. Network security is a complicated subject, historically only tackled by well-trained and experienced experts. However, as more and more people become “wired”, an increasing number of people need to understand the basics of security in a network world.
Network security is “keeping information private andsecure from unauthorized users”.
Cryptography has a long and colorful history. Historically, four groups of people have used and contributed to the art if cryptography: military, the diplomatic corps, diarists and lovers. Of these the military has had the most important role and has shaped the field. Suppose that someone wants to send a message to a receiver, and wants to be sure that no one else can read the message. However, there is the possibility that someone else opens the letter and hearts the electronic communication. The cryptography process explaining through a generalized function is discussed through which encryption and decryption is done by the various algorithms like RSA algorithms, Hash functions and many cryptographic algorithms.
Cryptography is “the science ofprotecting data”.
Submitted by subbaiah
