New Way to Generating and Simulation QKD

Hardeer Kaur, Jai Sukh Paul Singh

Quantum key distribution is the most secure and reliable way of generating key for public cryptography. Everyday engineers develop new protocols to ensure data protection. On the contrary, hackers also developed new ways to get into the systems. Quantum key distribution help users to send and receive data with infallible security. In this article, we present an introduction to BB84 & MKP16 protocols and list some of their shortcomings. Further, we try to find answers to these shortcomings with our High Yield Novel QKD (HYQKD) protocol. We wrote a QISKIT program to simulate HYQKD, BB84 & MKP16 protocols. We compared the novel QKD protocol with the existing BB84 & MKP16 protocols and compiled the results in terms of error rate and key length. With our comparison we concluded that BB84 protocol has the least Key rate and highest error rate, MKP16 has twice the key rate and half the error in comparison to BB84 and for novel QKD it depends upon the number of available channels and the number of Eve(s) attacking.

Ramona Wolf

Daniel J. Rogers

Manish Kalra, Ramesh Chandra Poonia

Quantum key distribution is a secure way of transferring the keys among entities involved in communication. BB84 is the first protocol for QKD in year 1984. In this paper we are giving the simulation process of BB84 protocol in C++ and also the simulation of proposed protocol in C++ using object oriented approach. Proposed protocol uses a two-way quantum channel and also generates an additional initial bits sequence at another end for polarization.

Konstantinos Gkouliaras, Vasileios Theos, Stylianos Chatzidakis

Xiongfeng Ma

We simulate quantum key distribution (QKD) experimental setups and give out some improvement for QKD procedures. A new data post-processing protocol is introduced, mainly including error correction and privacy amplification. This protocol combines the ideas of GLLP and the decoy states, which essentially only requires to turn up and down the source power. We propose a practical way to perform the decoy state method, which mainly follows the idea of Lo's decoy state. A new data post-processing protocol is then developed for the QKD scheme with the decoy state. We first study the optimal expected photon number mu of the source for the improved QKD scheme. We get the new optimal mu=O(1) comparing with former mu=O(eta), where eta is the overall transmission efficiency. With this protocol, we can then improve the key generation rate from quadratic of transmission efficiency O(eta2) to O(eta). Based on the recent experimental setup, we obtain the maximum secure transmission distance of over 140 km.