Smart photons

Shalbani Das, Ajanta Das

Maintaining security in smart cities and various smart applications has become a most challenging research domain to provide secure access to the society. Exposure of digital data to intruders can easily happen through different smart gadgets knowingly or unknowingly. To ensure security, the role of quantum cryptography is essential in this regard. Quantum cryptography is achieved by utilizing the polarization property of photon and quantum key distribution (QKD). In contrast to a classical computer, quantum computers achieve exponential speedup through reversible operations with the intention to provide security without compromising processing speed in smart applications. In this chapter, concepts, features, and technologies of smart cities are presented. Next, the important role of quantum computing in security with quantum key distribution protocols are explained. This chapter presents an algorithm of encryption and secret key to give the insights of QKD protocol. The chapter concludes with future directives of QKD in smart cities.

David P. Hamilton

João Batista Rosa Silva, Rubens Viana Ramos, Elvio César Giraudo

Hassan Kaatuzian

It seems world organizations, because of Covid-19 disaster, are oriented considerably into smart cities quarantine capabilities, digital electronics interactions and digital economics. In this paper, we've tried to challenge IoT5G systems in smart cities from both cultural and technological viewpoints. Although we should not be pessimist about critical situations we're encountering in realization of smart cities, But we must be realist about serious dangers and high price of invasion of privacy in IoT systems. They could probably play major roles as command centers for organized international systematic crimes which will threaten human citizens. We should prepare ourselves technologically for this kind of conspiracy and how to solve this cultural problem. In this study Quantum Photonic Computers (QPC) are basically suggested as alternatives to defeat misusing of IoT -5G networks. It's directly related to our national security, specifically for non-anglophone nations. QPC, will work differently in comparison with classical digital computers. They work much more similar to human brain. Because physical properties of materials have been taken into account. We've used time-domain statistical dynamic Montecarlo method for our simulations of Photons' quantum switch behaviors. Errors in our estimations, compared with experiments, always are much less than or at most five percent. In contrast with classic computers that works symbolically, QPC will act physically according to quantum properties of real materials. In contrast with Digital computers that are human oriented, Quantum computers are nature oriented. For this nature friendly reason of QPC, they'll act as good alternatives in future 6G networks to avoid misusing 5GIoT revenues.