The future is already here: quantum cryptography

Kumari Neha, Amrita Amrita

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.

Ruwayda Q. Alharbi, Soha S. Zaghloul

Maths-based cryptography has prevailed for years in the world of information security. Although this approach has succeeded till now, but it still has its drawbacks such as loopholes and life expectancy problem. Researchers found that Quantum Cryptography, which is based on the laws of physics, might be a good alternative. Therefore, we were motivated to analyze a number of research papers in the field. This paper studies both approaches, their advantages, disadvantages, and their expected future. Moreover, it exposes the basic principles of Quantum Cryptography as well as its protocols. It explains why Quantum Cryptography is considered as an alternative to the Classical Cryptography. In addition, it highlights the status of Quantum Cryptography in research nowadays. Finally, we predict which approach will dominate the world of information security in the far future.

nbspVenkatesh Prasad. G, nbspRohit A S Nair, S nbspNagamani +1 more

Tianqi Zhou, Jian Shen, Xiong Li +2 more

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 of the 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. Moreover, in order to simulate real situations in the future Internet, we also search the QKD protocol in the noisy channel. The results reflect the unconditional security of quantum cryptography theoretically, which is suitable for the Internet as ever-increasing challenges are inevitable in the future.