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Quantum key distribution (QKD) is the fastest-growing and relatively mature technology in the field of quantum information, enabling information-theoretically secure key distribution between two remote users. Although QKD based on…

In this paper, we propose the Quantum Data Center (QDC), an architecture combining Quantum Random Access Memory (QRAM) and quantum networks. We give a precise definition of QDC, and discuss its possible realizations and extensions. We…

Quantum Physics · Physics 2023-09-25 Junyu Liu , Connor T. Hann , Liang Jiang

Quantum computing poses significant threats to conventional cryptographic techniques such as RSA and AES, motivating the need for quantum secure communication methods. Quantum Key Distribution (QKD) offers information theoretic security…

The growing complexity of Internet of Things (IoT) environments, particularly in cross-domain data sharing, presents significant security challenges. Existing data-sharing schemes often rely on computationally expensive cryptographic…

Cryptography and Security · Computer Science 2024-11-15 Kexian Liu , Jianfeng Guan , Xiaolong Hu , Jianli Liu , Hongke Zhang

Hydropower facilities are often remotely monitored or controlled from a centralized remote-control room. Additionally, major component manufacturers monitor the performance of installed components. While these communications enable…

Quantum Physics · Physics 2023-10-23 Adrien Green , Jeremy Lawrence , George Siopsis , Nicholas Peters , Ali Passian

The quantum dense coding (DC) protocol, which has no security feature, deals with the transmission of classical information encoded in a quantum state by using shared entanglement between a single sender and a single receiver. Its…

Quantum Physics · Physics 2024-09-17 Ayan Patra , Rivu Gupta , Tamoghna Das , Aditi Sen De

The steady growth of artificial intelligence (AI) has accelerated in the recent years, facilitated by the development of sophisticated models such as large language models and foundation models. Ensuring robust and reliable power…

Artificial Intelligence · Computer Science 2025-10-14 Andrea Marinoni , Sai Shivareddy , Pietro Lio' , Weisi Lin , Erik Cambria , Clare Grey

The proliferation of Internet of Things (IoT) networks demands security mechanisms that protect constrained devices without the computational cost of public-key cryptography. Conventional Pre-Shared Key (PSK) encryption, while efficient,…

Cryptography and Security · Computer Science 2025-12-09 Haranath Rakshit , Rajkumar Bhandari , Subhasis Banerjee

A central challenge in developing quantum computers and long-range quantum networks lies in the distribution of entanglement across many individually controllable qubits. Colour centres in diamond have emerged as leading solid-state…

During the last 20 years, the advance of communication technologies has generated multiple exciting applications. However, classical cryptography, commonly adopted to secure current communication systems, can be jeopardized by the advent of…

Quantum key distribution (QKD), which promises secure key exchange between two remote parties, is now moving toward the realization of scalable and secure QKD networks (QNs). Fully connected, trusted node-free QNs have been realized based…

Quantum Physics · Physics 2025-02-18 Wenhan Yan , Xiaodong Zheng , Wenjun Wen , Liangliang Lu , Yifeng Du , Yanqing Lu , Shining Zhu , Xiao-Song Ma

Quantum digital signatures (QDSs), which distribute and measure quantum states by key generation protocols and then sign messages via classical data processing, are a key area of interest in quantum cryptography. However, the practical…

Quantum Physics · Physics 2024-07-16 Jing-Wei Bian , Bing-Hong Li , Yuan-Mei Xie , Hua-Lei Yin , Zeng-Bing Chen

Quantum key distribution (QKD) based on coherent states is well known for its implementation simplicity, but it suffers from loss-dependent attacks based on optimal unambiguous state discrimination. Crucially, previous research has…

Quantum Physics · Physics 2020-06-05 Li Liu , Yukun Wang , Emilien Lavie , Arno Ricou , Chao Wang , Fen Zhuo Guo , Charles Ci Wen Lim

An application of quantum communications is the transmission of qubits to create shared symmetric encryption keys in a process called Quantum Key Distribution (QKD). Contrary to public-private key encryption, symmetric encryption is safe…

Quantum Physics · Physics 2019-04-25 Tom Vergoossen , Robert Bedington , James A Grieve , Alexander Ling

Device-independent quantum key distribution (DI-QKD) enables information-theoretically secure key exchange between remote parties without any assumptions on the internal workings of the devices used for its implementation. However, its…

Quantum Physics · Physics 2025-11-20 Makoto Ishihara , Anthony Brendan , Wojciech Roga , Ulrik L. Andersen , Masahiro Takeoka

The channel loss incurred in long-distance transmission places a significant burden on quantum key distribution (QKD) systems: they must defeat a passive eavesdropper who detects all the light lost in the quantum channel and does so without…

Quantum Physics · Physics 2016-07-20 Quntao Zhuang , Zheshen Zhang , Justin Dove , Franco N. C. Wong , Jeffrey H. Shapiro

Anonymous communication networks (ACNs) enable Internet browsing in a way that prevents the accessed content from being traced back to the user. This allows a high level of privacy, protecting individuals from being tracked by advertisers…

Quantum Physics · Physics 2024-05-13 Mohammad Saidur Rahman , Stephen DiAdamo , Miralem Mehic , Charles Fleming

We propose Shuttling-based Distributed Quantum Computing (SDQC), a hybrid architecture that combines the strengths of physical qubit shuttling and distributed quantum computing to enable scalable trapped-ion quantum computing. SDQC performs…

Quantum Physics · Physics 2025-12-03 Seunghyun Baek , Seok-Hyung Lee , Dongmoon Min , Junki Kim

The quantum cryptographic conferencing (QCC) protocol, which distributes identical secure keys to user groups, is a crucial component of the quantum network. Previous experimental works have implemented the measurement-device-independent…

Quantum Physics · Physics 2026-02-25 Yifeng Du , Yang Hu , Yufeng Liu , Wenhan Yan , Jinghao Zhang , Shining Zhu , Xiao-Song Ma

Secure communication is a critical requirement for Internet of Things (IoT) devices, which are often based on Microcontroller Units (MCUs). Current cryptographic solutions, which rely on software libraries or dedicated hardware…

Cryptography and Security · Computer Science 2025-09-30 Jingyao Zhang , Elaheh Sadredini