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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Quantum Technologies

John Rarity

Published Jan 1, 1998• 4 citations
Publisher

Abstract

Could we send information encoded in single photons possibly exploiting the wave particle duality inherent in quanta? Could we even build arbitrary processors using single quanta to encode bits of information? Within this talk I would hope to introduce you to the area of quantum information which is largely a theoretical preserve at the moment. There are however various experimental in-roads into this area, the most notable being secure key exchange using quantum cryptography.

DOI
10.1109/cleoe.1998.719115

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•Feb 24, 2020•1 citation
Could we send information encoded in single photons possibly exploiting the wave particle duality inherent in quanta? Could we even build arbitrary processors using single quanta to encode bits of information? Within this talk I would hope to introduce you to the area of quantum information which is largely a theoretical preserve at the moment. There are however various experimental in-roads into this area, the most notable being secure key exchange using quantum cryptography.
Quantum cryptography, with the chance of advancement offered by its basis on the single principle of quantum mechanics, constitutes a notable point of strength in the advancement of new cryptography research. Utilizing the distinctive properties of quantum mechanism, such as qubits, quantum cryptography offers enhanced protection against quantum computer attacks. This paper proposes a novel quantum cryptographic algorithm that integrates quantum key generation with the Advanced Encryption Standard (AES) technique to safeguard data from quantum threats. By combining quantum bit generation with AES encryption, the confidentiality of information exchanged between parties is preserved. The quantum bit generation technique exploits the inherent properties of quantum mechanics, particularly quantum superposition, to generate secure cryptographic keys. Leveraging the efficiency and robustness of the AES encoding standard, this approach offers heightened security against quantum attacks. Experimental analysis using MATLAB software validates the effectiveness of the proposed method.Top of Form
Cyberspace has become the most popular carrier of information exchange in every corner of our life, which is beneficial for our life in almost all aspects. With the continuous development of science and technology, especially the quantum computer, cyberspace security has become the most critical problem for the Internet in near future. In this paper, we focus on analyzing characteristics of the quantum cryptography and exploring its advantages of it in the future Internet. It is worth noting that we analyze the quantum key distribution (QKD) protocol in the noise-free channel. To include real practical stimulators, there are developed various QKD Schemes for the noisy channels. Here we develop the unconditional security of quantum cryptography theoretically, which is suitable for the Internet as ever-increasing challenges are inevitable in the future. Quantum key distribution (QKD) uses individual light quanta in quantum superposition states to guarantee unconditional communication security between distant parties. In practice, the achievable distance for QKD has been limited to a few hundred kilometers, due to the channel loss of fibers or terrestrial free space that exponentially reduced the photon rate. Also experimentally it is proved that the Satellite-based QKD promises to establish a global-scale quantum network by exploiting the negligible photon loss and decoherence in the empty space. In this paper, we also give some introduction to various public-key cryptography and also touch on the various functions, advantages, and disadvantages of quantum cryptography and the need for quantum cryptography in the future as in data encoding, and digital signatures, and many more. It also covers the various securities issue of our current cryptography system. Different protocols BB84 i.e., the first QKD protocol also some other protocols, and finally the future directions of quantum cryptography followed by the conclusion of the paper.
In the beginning was the photon, and the photon was with information. Theoretically speaking, a photon can travel arbitrarily long before it enters into a detector, which then clicks. How much information can a photon carry? We study a bipartite asymmetric protocol as the extension of that proposed by Del Santo and Dakic. Suppose that Alice and Bob are distant from each other and each of them has an nnn-bit string. They are tasked to exchange the information of their local n-bit strings with each other, using only a single photon during the communication. It has been shown that the superposition of different spatial locations in a Mach-Zehnder (MZ) interferometer enables bipartite local encodings. We prove that, after the photon's travelling through a cascade of nnn-level MZ interferometers in our protocol, the one of Alice or Bob whose detector clicks can access the other's full information of nnn-bit string, while the other can gain one-bit of information. That is, the wave-particle duality makes two-way signaling possible, and a single photon can carry infinite information as nnn goes infinite.