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Chinese Journal of Quantum Electronics

Simulation of quantum key distribution on classical computer

Zheng Bao-yu

Published Jan 1, 2004• 1 citation
OpenAlex

Abstract

The simulation of quantum cryptography on classical computer was discussed. Methods to express the preparation and measurement of quantum states on current computer and the basic algorithms for simulating the quantum key distribution protocols were given. All the corresponding results of each protocol were presented and compared with the theoretic results. It was shown that the simulation results are completely tallied with theoretic ones.

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The simulation of quantum cryptography on classical computer was discussed. Methods to express the preparation and measurement of quantum states on current computer and the basic algorithms for simulating the quantum key distribution protocols were given. All the corresponding results of each protocol were presented and compared with the theoretic results. It was shown that the simulation results are completely tallied with theoretic ones.
The demand for security is growing exponentially in every field of developing technology. Over the decades, classical and modern cryptographic algorithms have served this need with an appreciable performance. But with the realization of threats to this backbone cryptography, researchers have developed a keen interest in Quantum cryptography(QC). QC provides an unconditionally secure means of information transfer through the basic laws of quantum mechanics. Quantum key distribution(QKD) is one of the most developed application of QC. But due to primitive technology it is still facing many developmental glitches. Although there is a fare amount of QKD experimentation available, the experiments are limited with specific set of parameters. To observe the effect of parameter variation it is essential to model the QKD process. This paper discusses the simulation approach for understanding and testing the working of practical prepare and measure QKD protocol. The developed model is tested with the experimental test data from three QKD setups. Performance parameters such as quantum bit error rate and secret key rate are analyzed. It is observed that the simulated results matches with the experimental results.
The last decade, the evolution in quantum computing has been enormous and real and reliable quantum computers are being developed quickly. One of the consequences of the upcoming quantum era is to make key distribution protocols insecure, as most of them are based on discrete algorithm problems. On the other hand, quantum computing provides a powerful and prominent tool for the safe transmission of information and cryptographic schemes and many of them have already been proposed. In this work, we discuss about quantum cryptography and we present certain quantum key distribution protocols. We also discuss about ‘potential attacks that can be performed against the quantum cryptographic schemes which are based on quantum system’s imperfections and loopholes.
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Quantum cryptography is anew branch of physics and cryptography which exploit quantum mechanical phenomena to guarantee the secrecy of cryptographic keys. This paper introduces the basic concepts, problems and methods of quantum key distribution. It introduces some basic knowledge of quantum mechanics and explains how these physical laws can be used in cryptography. The basic protocols of quantum cryptographic used for key distribution based on entangled polarization photons pair are also presented and assessed. The well known concepts based on entangled pairs of photons (Ekert) schemes are presented. In these schemes Alice and Bob perform measurements on each photon along one of two, three or four directions given by unit vectors and (i, j = 1, 2, 3,4) respectively. Therefore the combinations are used from Alice and Bob is four, nine, or sixteen with respect to number of measurement directions (i = 2, 3 or 4) respectively. The analysis and comparative study between these versions are presented
Quantum cryptography is anew branch of physics and cryptography which exploit quantum mechanical phenomena to guarantee the secrecy of cryptographic keys. This paper introduces the basic concepts, problems and methods of quantum key distribution. It introduces some basic knowledge of quantum mechanics and explains how these physical laws can be used in cryptography. The basic protocols of quantum cryptographic used for key distribution based on entangled polarization photons pair are also presented and assessed. The well known concepts based on entangled pairs of photons (Ekert) schemes are presented. In these schemes Alice and Bob perform measurements on each photon along one of two, three or four directions given by unit vectors and (i, j = 1, 2, 3,4) respectively. Therefore the combinations are used from Alice and Bob is four, nine, or sixteen with respect to number of measurement directions (i = 2, 3 or 4) respectively. The analysis and comparative study between these versions are presented