A quantum encryption design featuring confusion, diffusion, and mode of operation

Quantum cryptography—the application of quantum information processing and quantum computing techniques to cryptography has been extensively investigated. Two major directions of quantum cryptography are quantum key distribution (QKD) and quantum encryption, with the former focusing on secure key distribution and the latter focusing on encryption using quantum algorithms. In contrast to the success of the QKD, the development of quantum encryption algorithms is limited to designs of mostly one-time pads (OTP) that are unsuitable for most communication needs. In this work we propose a non-OTP quantum encryption design utilizing a quantum state creation process to encrypt messages. As essentially a non-OTP quantum block cipher the method stands out against existing methods with the following features: 1. complex key-ciphertext relation (i.e. confusion) and complex plaintext-ciphertext relation (i.e. diffusion); 2. mode of operation design for practical encryption on multiple blocks. These features provide key reusability and protection against eavesdropping and standard cryptanalytic attacks.

High-dimensional entanglement-enabled holography for quantum encryption

Cryptography plays an important role in information security, which is widely applied in the various fields of society. Quantum cryptography has shown its great advantages in information security compared with the classical one. Two major directions of quantum cryptography are quantum key distribution (QKD) and quantum encryption, with the former focusing on secure key distribution and the latter focusing on encryption using quantum algorithms. In contrast to the well accepted success of the QKD, the development of quantum encryption is rather limited because of the difficulties of building up algorithms and the constructing the practical quantum computers. Here we propose a new scheme of quantum encryption based on high-dimensional entanglement holography. Firstly, we experimentally realize the quantum holography based on the high-dimensional orbital angular momentum (OAM) entanglement. Then, OAM-selective holographic scheme for quantum encryption is proposed and demonstrated. Our results show that introducing quantum entangled state into OAM holography makes the OAM holography possess infinite information channels and the transmission of information be absolute security in principle. Furthermore, decryption in the presence of strong noise is achieved. Our work opens up a new way to realize quantum information security.

Quantum Measurement and Entanglement: Wave Function Collapse

The postulates presented at this point are generally agreed upon as being the primary set. But in the course of these postulates, there is no mention of the consequences of measurement. This chapter discusses this problem and the solution as provided by the Von-Neumann postulate. The concept of the projection operator is introduced, and this leads naturally to the study of the quantum entangled state. The results show in part the origin of the struggle that Einstein and others had with quantum, and the Einstein, Podolsky, and Rosen (EPR) paradox. Quantum entanglement is the key to advanced ideas in quantum encryption, teleportation, and quantum computing.

Threat and Intruder Models of Multi-agent Robotic System Using Police Office Model with Quantum Encryption*

The subject of this study is to ensure the confidentiality of information in mobile robotic systems. To ensure the confidentiality of information, it is proposed to use quantum encryption methods. Existing developments in this area allow to ensure the correct generation of quantum keys between two elements. The paper considers the functioning of the multi-agent robotic system based on the Police Office Model, the general scheme of functioning and basic processes of information interaction are given. The authors consider the issue of the protection of the multi-agent robotic system by using quantum keys from various threats, offering a classification of threats. Based on the model of the multi-agent robotic system, an intruder model is proposed that includes the level of access of the intruder to the system and the period of interaction of the intruder on the system, based on the life-cycle model. As a result of the research, a model of generalized functioning of a mobile robotic system with encryption based on quantum keys, a threat model and an intruder model was proposed.

Confidentiality assurance in Multi-agent Robotic System

In this paper, the authors consider the feasibility of using quantum encryption in a multi-agent robotic system. The authors consider examples of such systems, describe the functional structure of the system in question, describe the scheme for ensuring information security. Finally, the authors see the use of quantum cryptographic algorithms appropriate for resolving the issue of confidentiality in multi-agent robotic systems and believe that this method has the potential for further scientific developments in the field of security in multi-agent robotic systems.