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About

Sebastian Ramacher is a leading researcher in quantum-secure communications and applied cryptography, with a focus on integrating quantum key distribution (QKD) with software-defined networking (SDN) for defense and critical infrastructure. His most notable contribution is the DISCRETION project, which achieved the first field demonstration of a quantum-enabled SDN during a military exercise in 2025—a landmark proof-of-concept showing how QKD can be combined with SDN to deliver flexible, resilient, and quantum-safe secure communications for European defense. This work addresses the urgent need to protect sensitive data against future quantum threats, bridging the gap between theoretical quantum cryptography and real-world operational deployment. While his citation count is still growing, the DISCRETION demonstration has already garnered attention for its practical impact, showcasing Ramacher’s ability to translate complex quantum technologies into actionable security solutions. His research sits at the intersection of quantum physics, network engineering, and cybersecurity, making him a key figure in the push toward post-quantum secure infrastructures. For students and researchers, Ramacher’s work exemplifies how cutting-edge quantum security can be operationalized in high-stakes environments.