Satellite-based Quantum Key Distribution (QKD) faces critical limitations due to photon loss, atmospheric turbulence, and the need for stateful protocols. The Quantum Burst Protocol (QBP), by contrast, provides a stateless, entropy-centric approach that avoids these pitfalls. This note compares the two paradigms and explains why QBP is uniquely suited to Earth-satellite secure communications.
Satellite-based Quantum Key Distribution (QKD) faces critical limitations due to photon loss, atmospheric turbulence, and the need for stateful protocols. The Quantum Burst Protocol (QBP), by contrast, provides a stateless, entropy-centric approach that avoids these pitfalls. This note compares the two paradigms and explains why QBP is uniquely suited to Earth-satellite secure communications.
I introduce the quantum burst protocol (QBP), which is a novel quantum-lite encryption scheme designed for ultra-low-latency 6G wireless environments. QBP replaces traditional quantum key distribution (QKD) with stateless, one-way quantum entropy bursts, enabling submillisecond secure communications between mobile or edge devices. Leveraging ephemeral key derivation and quantum-authenticatable tags, QBP provides quantum-resilient confidentiality, authentication, and forward secrecy using 2-3-qubit quantum capability. I present the protocol design, performance analysis, and formal security proof in this short article, demonstrating that QBP is theoretically sound and practically deployable on 6G-class hardware.
The Quantum Burst Protocol (QBP) is a novel quantum-lite encryption scheme tailored for ultralow-latency 6G wireless environments. QBP replaces traditional quantum key distribution (QKD) with stateless, one-way quantum entropy bursts, enabling submillisecond secure communication between mobile or edge devices. Leveraging ephemeral key derivation and quantum-authenticatable tags, QBP provides quantum-resilient confidentiality, authentication, and forward secrecy with minimal (2-3 qubit) quantum capability. We present the protocol design, performance analysis (demonstrating sub-0.2ms latency), and a formal security proof that includes a detailed mathematical analysis of its security properties against quantum adversaries. QBP is shown to be theoretically sound and practically deployable on 6G-class hardware.
Quantum Key Distribution (QKD) has emerged as a fundamentally secure approach to communication in the era of quantum computing, offering protection against threats posed to classical cryptographic schemes such as RSA and Diffie-Hellman. This thesis presents a comprehensive performance analysis of satellite-based QKD protocols, focusing on both prepare-and-measure and entanglement-based schemes under realistic atmospheric and operational conditions. The study begins by introducing the theoretical foundations of quantum communication, including qubits, entanglement, and quantum entropy, and motivates the need for satellite-based QKD to overcome the distance limitations of fiber-based systems. Subsequently, the thesis evaluates four prominent QKD protocols-BB84, B92, BBM92, and E91-using a circular beam propagation model that incorporates atmospheric effects such as diffraction, turbulence, attenuation, and pointing errors, along with environmental noise contributions for uplink and downlink. Comparative numerical simulations reveal that protocol performance is strongly influenced by channel asymmetries, beam propagation characteristics, and noise, providing guidance on optimal protocol selection for low Earth orbit (LEO) satellite links. The research further investigates high-dimensional (HD) QKD protocols, specifically HD-BB84 and HD-Extended B92, using the elliptic-beam approximation to account for turbulence-induced distortions for both uplink and downlink. Simulations under vary ing system dimensions, weather conditions, and zenith angles demonstrate that HD-BB84 achieves higher key rates, superior noise tolerance, and more favorable probability distributions of the key rate compared to HD-Extended B92, highlighting the advantages of high-dimensional encoding for robust satellite-based QKD.
Satellite-based quantum communications represent a critical advancement in the pursuit of secure, global-scale quantum networks. Leveraging the principles of quantum mechanics, these systems offer unparalleled security through Quantum Key Distribution (QKD) and other quantum communication protocols. This review provides a comprehensive overview of the current state of satellite-based quantum communications, focusing on the evolution from terrestrial to space-based systems. We explore the distinct advantages and challenges of discrete-variable (DV) and continuous-variable (CV) quantum communication technologies in the context of satellite deployments. The paper also discusses key milestones such as the successful implementation of quantum communication via the Micius satellite and outlines the primary challenges, including atmospheric turbulence and the development of quantum repeaters, that must be addressed to achieve a global quantum internet. This review aims to consolidate recent advancements in the field, providing insights and perspectives on the future directions and potential innovations that will drive the continued evolution of satellite-based quantum communications.
Quantum key distribution (QKD) is the most common secure techniques for exchanging key between two or more legitimate users using some insecure network. Despite much progress, ground-based secure communication systems using QKD is not feasible due to high atmospheric loss in free space communication where the range of communication may be extended. Thus, the physicists will be able to create satellite based QKD network for secure communication. This manuscript summarizes research and development from QKD protocols between two legitimate users to Ground to satellite based QKD network. It includes the progress of secure protocols using QKD around the world in respect with infrastructure, security and the technical challenges.
Abstract Quantum key distribution (QKD) is a family of protocols for growing a private encryption key between two parties. Despite much progress, all ground-based QKD approaches have a distance limit due to atmospheric losses or in-fibre attenuation. These limitations make purely ground-based systems impractical for a global distribution network. However, the range of communication may be extended by employing satellites equipped with high-quality optical links. This manuscript summarizes research and development which is beginning to enable QKD with satellites. It includes a discussion of protocols, infrastructure, and the technical challenges involved with implementing such systems, as well as a top level summary of on-going satellite QKD initiatives around the world.