Network Security is the most vital component in data protection because it is responsible for protecting all information passed through computers containing network. Network Security refers to all hardware and software functions, characteristics, features, accountability, measures, access control, and administrative and management policy required to provide an acceptable level of protection for Hardware and Software, and information in a network. Here we are focusing on the technique of Quantum Cryptography which uses the law of quantum physics for unconditionally secure data communications. This is an improvement because the cryptography currently in use, known as conventional cryptography, is dependent entirely on the difficulty level of a mathematical equation. To write this paper we have studied about Network Security and methods of encoding and decoding in detail. Hereby we are presenting our work on the enhancement of cryptography using various encoding and decoding approaches. The proposed algorithm has a better speed compared with other encoding algorithm. Nevertheless, the proposed algorithm improves encoding security by inserting the symmetric layer. The proposed algorithm will be useful to the applications which require the same procedure of encoding and decoding. This paper makes a comparison between classical cryptography and quantum cryptography and outlines the increased security level provided by quantum cryptography.

Network security, Encoding, Decoding, Cryptography, Quantum Cryptography

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