Dialogues on Quantum Computing

Shaokai Lin, Zichuan Wang, Lior Horesh C

With the emergence of quantum computing and quantum networks, many communication protocols that take advantage of the unique properties of quantum mechanics to achieve a secure bidirectional exchange of information, have been proposed. In this study, we propose a new quantum communication protocol, called Continuous Quantum Secure Dialogue (CQSD), that allows two parties to continuously exchange messages without halting while ensuring the privacy of the conversation. Compared to existing protocols, CQSD improves the efficiency of quantum communication. In addition, we offer an implementation of the CQSD protocol using the Qiskit framework. Finally, we conduct a security analysis of the CQSD protocol in the context of several common forms of attack.

Philip L. Roe

Qianqian Hu, Ying Zhang, Ziyan Zhao +1 more

With the development of quantum technology, the application of quantum characteristics to wireless networks has become a research hotspot. In this paper, a quantum handshake method based on quantum dialogue and wireless network has been proposed. At first, quantum computation is introduced and the IEEE802.11i is carefully discussed and analyzed. Then, by combining quantum dialogue with IEEE802.11i wireless network, a quantum handshake method is put forward, which can effectively guarantee the communication security of data in a wireless network. In terms of transmission time and security, quantum handshake method is better than classic handshake. In addition, the proposed scheme has high security and practicability.

Colin P. Williams

Ashwin Saxena, Kishore Thapliyal, Anirban Pathak

A continuous variable (CV) controlled quantum dialogue (QD) scheme is proposed. The scheme is further modified to obtain two other protocols of (CV) secure multiparty computation. The first one of these protocols provides a solution of two-party socialist millionaire problem, while the second protocol provides a solution for a special type of multi-party socialist millionaire problem which can be viewed as a protocol for multiparty quantum private comparison. It is shown that the proposed scheme of (CV) controlled (QD) can be performed using bipartite entanglement and can be reduced to obtain several other two- and three-party cryptographic schemes in the limiting cases. The security of the proposed scheme and its advantage over corresponding discrete variable (DV) counterpart are also discussed. Specifically, the ignorance of an eavesdropper, i.e., information encoded by Alice/Bob, in the proposed scheme is shown to be more than that in the corresponding (DV) scheme, and thus the present scheme is less prone to information leakage inherent with the (DV) (QD) based schemes. It is further established that the proposed scheme can be viewed as a (CV) counterpart of quantum cryptographic switch which allows a supervisor to control the information transferred between the two legitimate parties to a continuously varying degree.