Lightweight Post-Quantum Security Scheme Protects Communications Between Drones and Ground Stations

A lightweight cryptographic security scheme integrating post-quantum key exchange, mutual authentication, and lightweight authenticated encryption has successfully secured simulated flight communications between aircraft and a ground control station, according to an original research study conducted by Shahad A. Hussien and Alharith A. Abdullah at the University of Babylon in Hillah, Iraq. Published in Frontiers in Computer Science within the Computer Security section, the peer-reviewed investigation demonstrates an end-to-end security architecture specifically tailored to protect data in transit across resource-constrained aerial systems. In simulation testing, the researchers confirmed that the integrated framework reliably safeguarded both the confidentiality and integrity of transferred Micro Air Vehicle Link messages while verifying the authenticity of both communicating entities.

The research addresses urgent operational challenges stemming from the rapid expansion of the unmanned aerial vehicle field, where airborne platforms increasingly handle sensitive communications under rigorous resource constraints. Hussien and Abdullah noted that while numerous security mechanisms have previously been introduced to protect aerial data exchanges, traditional solutions present significant operational trade-offs. Many established approaches suffer from high computational complexity, imposing processing overheads that strain the constrained memory and computational resources typical of unmanned aircraft. Furthermore, traditional cryptographic schemes remain vulnerable to the emerging capabilities of quantum computing, presenting an unresolved security challenge for aerial networks. As a result, developing lightweight security protocols that simultaneously achieve quantum resistance and minimal computational overhead has emerged as an essential requirement for safeguarding modern unmanned aerial systems.

Building directly upon the post-quantum key exchange, the architecture introduces a mutual authentication mechanism inspired by Wi-Fi Protected Access 2. This authentication layer ensures that both communicating parties, comprising the airborne aircraft and the ground control station, verify each other’s identities before any payload transmission occurs. In their experimental analysis, the authors demonstrated that the validity of transferred messages is strictly conditional upon this bidirectional verification process.

For ongoing data protection following successful mutual authentication, the proposed protocol deploys an Ascon Authenticated Encryption with Associated Data lightweight algorithm to execute both data encryption and verification. The investigators implemented this scheme within a simulation-based unmanned aerial vehicle environment to evaluate its performance in safeguarding Micro Air Vehicle Link, or MAVLink, messages transferred between aircraft and the ground control station. The experimental results confirmed the successful transfer of encrypted MAVLink messages, demonstrating that the ASCON-AEAD implementation consistently preserved message confidentiality and integrity throughout flight communication sessions.

To rigorously evaluate the cryptographic strength and quality of the keys generated by the security mechanism, the authors conducted statistical randomness evaluations using the National Institute of Standards and Technology test suite. The researchers documented approximate average p-values of 0.6519 for the authentication keys and 0.74388 for the encryption keys, confirming good statistical randomness for the derived keys and substantiating their cryptographic reliability within the proposed protocol.

Beyond evaluating cryptographic robustness, the research team analyzed system execution times to verify that the combined security framework operates within acceptable latency limits for resource-constrained aerial environments. The investigators concluded that these millisecond-scale processing speeds fall comfortably within acceptable operational limits for unmanned aerial vehicles, confirming that the proposed solution delivers an efficient and effective security framework that combines quantum resistance, mutual authentication, and lightweight encryption for secure aerial communications.

Subject of Research: Post-quantum mutual authentication and lightweight encryption for unmanned aerial vehicles

Article Title: A post-quantum lightweight mutual authentication and encryption scheme for secure UAV communications

Article References: Abdullah, A. A., & Hussien, S. A. (2026). A post-quantum lightweight mutual authentication and encryption scheme for secure UAV communications. Frontiers in Computer Science, 8, Article 1947684. https://doi.org/10.3389/fcomp.2026.1947684

Image Credits: AI Generated

DOI: 10.3389/fcomp.2026.1947684

Keywords: unmanned aerial vehicles, post-quantum cryptography, Kyber 512, ASCON-AEAD, mutual authentication, MAVLink security, drone communication, NIST randomness tests, post-quantum, lightweight, mutual, authentication