QUANTUM KEY DISTRIBUTION SCHEME: AN IMPROVEMENT BASED ON BB84 PROTOCOL

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KAUSIK SAHA
Sirshendu Sekhar Ghosh
Dilip Kumar Shaw

Abstract

Cryptography is being introduced to secure data. Through Classical Cryptographic technique, we can encrypt our data and secure secret key also. But classical cryptography is based on mathematical techniques where reversing one-way function is possible with sufficient computing power and time. So, Quantum Cryptography is introduced to overcome those drawbacks of traditional classical cryptography. It is based on the values of quantum mechanics and photon. Scientists and researchers have brought up a new key distribution protocol based on Quantum Cryptography is called Quantum Key Distribution (QKD) Protocol. The first QKD protocol BB84 was introduced by Charles Bennett and Gilles Brassard in 1984. After that several QKD protocols have been created. In this paper we have improved BB84 Protocol by removing the drawbacks of the existing algorithm towards Eavesdropping which may not be detected or disclosing large portion of secret key. Steps of the existing BB84 algorithm along with the modified one is described in detail with example and pseudo code. Limitations of BB84 and comparative study of both the existing and the improved one based on their security has been made and described in this current work.

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Author Biography

KAUSIK SAHA, Department of Computer Applications, National Institute of Technology Jamshedpur, Jamshedpur-831014, Jharkhand, India.

I am a student of Master of Technology (M.Tech.) in Information Systems security Engineering of National Institute of Technology Jamshedpur, India.

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