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Quantum secure direct communication (QSDC) enables the message sender to directly send secure messages to the receiver through the quantum channel without keys. Device-independent (DI) and measurement-device-independent (MDI) QSDC protocols…

Quantum Physics · Physics 2024-11-19 Cheng Liu , Cheng Zhang , Shi-Pu Gu , Xing-Fu Wang , Lan Zhou , Yu-Bo Sheng

Quantum secure direct communication (QSDC) is a quantum communication paradigm that transmits confidential messages directly using quantum states. Measurement-device-independent (MDI) QSDC protocols can eliminate the security loopholes…

Quantum Physics · Physics 2024-04-04 Xiangjie Li , Min Wang , Xingbo Pan , Yunrong Zhang , Guilu Long

Reference-frame-independent quantum key distribution (RFI QKD) significantly alleviates alignment requirements for reference frame in practical quantum communication systems. While the original protocol requires Alice to prepare six quantum…

Quantum Physics · Physics 2025-04-23 Jia-Wei Ying , Shi-Pu Gu , Xing-Fu Wang , Lan Zhou , Yu-Bo Sheng

Quantum secure direct communication (QSDC) is the technology to transmit secret information directly through a quantum channel without neither key nor ciphertext. It provides us with a secure communication structure that is fundamentally…

Quantum Physics · Physics 2018-05-21 Zeng-Rong Zhou , Yu-Bo Sheng , Peng-Hao Niu , Liu-Guo Yin , Gui-Lu Long

Quantum secure direct communication (QSDC) can directly transmit secrete messages through quantum channel. Device-independent (DI) QSDC can guarantee the communication security relying only on the observation of the Bell inequality…

Quantum Physics · Physics 2023-03-29 Lan Zhou , Bao-Wen Xu , Wei Zhong , Yu-Bo Sheng

The reference-frame-independent quantum key distribution (RFI QKD) protocol enables QKD systems to function effectively despite slowly varying reference frames, offering a distinct advantage in practical scenarios, particularly in mobile…

Quantum Physics · Physics 2024-12-02 Xin Liu , Di Luo , Zhicheng Luo , Shizhuo Li , Zhenrong Zhang , Kejin Wei

"Device-independent" not only represents a relaxation of the security assumptions about the internal working of the quantum devices, but also can enhance the security of the quantum communication. In the paper, we put forward the first…

Quantum Physics · Physics 2019-07-03 Lan Zhou , Yu-Bo Sheng , Gui-Lu Long

Quantum secure direct communication (QSDC) uses the quantum channel to transmit information reliably and securely. In order to eliminate the security loopholes resulting from practical detectors, the measurement-device-independent (MDI)…

Quantum Physics · Physics 2022-12-13 Xiang-Jie Li , Dong Pan , Gui-Lu Long , Lajos Hanzo

Rapidly and randomly drifted reference frames will shorten the link distance and decrease the secure key rate of realistic quantum key distribution (QKD) systems. However, an actively or inappropriately implemented calibration scheme will…

Quantum Physics · Physics 2021-04-05 Bang-Ying Tang , Huan Chen , Ji-Peng Wang , Hui-Cun Yu , Lei Shi , Shi-Hai Sun , Wei Peng , Bo Liu , Wan-Rong Yu

Reference-frame-independent (RFI) quantum key distribution (QKD) presents promising advantages, especially for mobile-platform-based implementations, as it eliminates the need for active reference frame calibration. While RFI-QKD has been…

Quantum Physics · Physics 2024-06-07 Zhiyu Tian , Ziran Xie , Rong Wang , Chunmei Zhang , Shihai Sun

Quantum secure direct communication (QSDC) is an important branch of quantum communication that transmits confidential message directly in a quantum channel without utilizing encryption and decryption. It not only prevents eavesdropping…

Quantum Physics · Physics 2020-06-29 Peng-Hao Niu , Jia-Wei Wu , Liu-Guo Yin , Gui-Lu Long

Device-Independent Quantum Secure Direct Communication (DI-QSDC) enhances quantum cryptography by enabling secure message transmission without relying on the trustworthiness of the devices involved. This approach mitigates risks associated…

Quantum Physics · Physics 2024-09-17 Nayana Das , Saikat Basu , Goutam Paul , Vijay S. Rao

Quantum secure direct communication (QSDC) has attracted a lot of attention, which exploits deep-rooted quantum physical principles to guarantee unconditional security of communication in the face of eavesdropping. We first briefly review…

Quantum Physics · Physics 2023-04-20 Xiang-Jie Li , Dong Pan , Gui-Lu Long , Lajos Hanzo

In practical quantum communication, imperfect devices may introduce side channels, creating opportunities for eavesdroppers. Especially on the source side, the side channels created by active modulation may compromise the security of the…

Quantum Physics · Physics 2025-06-30 Jia-Wei Ying , Qi Zhang , Shi-Pu Gu , Xing-Fu Wang , Lan Zhou , Yu-Bo Sheng

Quantum Secure Direct Communication (QSDC) is an important branch of quantum cryptography, which enables the secure transmission of messages without prior key encryption. However, traditional quantum communication protocols rely on the…

Quantum Physics · Physics 2024-08-15 Nayana Das , Goutam Paul

Quantum communication provides an absolute security advantage, and it has been widely developed over the past 30 years. As an important branch of quantum communication, quantum secure direct communication (QSDC) promotes high security and…

Quantum Physics · Physics 2017-06-07 Wei Zhang , Dong-Sheng Ding , Yu-Bo Sheng , Lan Zhou , Bao-Sen Shi , Guang-Can Guo

Very recently, the experimental demonstration of Quantum Secure Direct Communication (QSDC) with state-of-the-art atomic quantum memory has been reported (Phys. Rev. Lett., 2017). Quantum Dialogue (QD) falls under QSDC where the secrete…

Quantum Physics · Physics 2017-10-27 Arpita Maitra

Reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) eliminates detector side-channel attacks and avoids reference-frame calibration. While its feasibility has been widely demonstrated, existing…

Quantum Physics · Physics 2026-01-09 Xin Liu , Zhicheng Luo , Kaibiao Qin , Jiawang Liu , Zhenrong Zhang , Kejin Wei

In this paper, we propose a new theoretical scheme for quantum secure direct communication (QSDC) with user authentication. Different from the previous QSDC protocols, the present protocol uses only one orthogonal basis of single-qubit…

Quantum Physics · Physics 2022-02-23 Nayana Das , Goutam Paul , Ritajit Majumdar

Quantum secure direct communication (QSDC) is a rapidly developing quantum communication approach, where secure information is directly transmitted, providing an alternative to key-based (de)encryption processes via Quantum Key Distribution…

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