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The main challenge in the current era is how to secure the communication networks on which the information is transmitted from source to destination. Different techniques and algorithms are used for securing the communication system and providing a more secure system that ensures confidentiality and the integrity of data. The secret in this system includes the shared key algorithm and the public key. By using the Quantum Cryptography technique, a more secure communication network is achieved. This technique of Quantum Cryptography is based on the following two elements, photon polarization and the principle of uncertainty. Photon polarization ensures that an eavesdropper cannot copy or even try to read the information which is being transmitted by using photons. The principle of uncertainty states that it is impossible to measure or observe the state of photons without disturbing their actual state. The main focus of this paper is on photon Cryptography and how this can be used to make the network more secured. Finally, we discuss the future of Quantum Cryptography. [ABSTRACT FROM AUTHOR]

The next generation of telesurgical robotics systems presents significant challenges related to network performance and data security. It is known that packet transmission in wide area networks is a complex stochastic process; thus, low bandwidth as well as high delay, jitter, and packet loss will greatly affect the quality of service (QoS) of teleoperation control, which is unacceptable in this kind of sensitive application. Furthermore, a relevant but more serious issue is the network attacks, particularly denial of service as well as data alteration or disclosure. The main motivation of this study is to deploy suitable security mechanisms while preserving the QoS of network-based bilateral teleoperation. We propose and apply a protocol that secures our teleoperation system while preserving its real-time constraints. More precisely, we present in this paper a bilateral generalized predictive controller coupled to a QoS-friendly IP security protocol. The experimental results demonstrate that the telerobotic system is able to satisfy both QoS and security requirements of real-time and sensitive teleoperation tasks. In fact, our teleoperation security protocol provides priority treatment while preventing attacks and avoiding potential deadline misses due to increased security cost. [ABSTRACT FROM PUBLISHER]