K. Petručeņa on Caffeinated Petručeņa https://kpetrucena.lv/ Recent content in K. Petručeņa on Caffeinated Petručeņa Hugo en-us Sun, 19 Apr 2026 00:00:00 +0000 Latvia at BOI 2026 (Espoo) https://kpetrucena.lv/posts/boi-2026/ Sun, 19 Apr 2026 00:00:00 +0000 https://kpetrucena.lv/posts/boi-2026/ Latvia has participated in the Baltic Olympiad in Informatics since 1995. BOI 2026 took place in the Helsinki metropolitan area (Aalto University, Espoo), and the Latvian team returned with three bronze medals. Topology-Oblivious Random-Walk Key Relaying in Quantum Key Distribution Networks https://kpetrucena.lv/research/2026-04-topology-oblivious-random-walk-key-relaying/ Wed, 01 Apr 2026 00:00:00 +0000 https://kpetrucena.lv/research/2026-04-topology-oblivious-random-walk-key-relaying/ A preprint on decentralized random-walk-based key relaying strategies in QKD networks. Problems with ETSI GS QKD 014 v1.1.1 https://kpetrucena.lv/posts/etsi-014-v1-problems/ Fri, 20 Mar 2026 00:00:00 +0000 https://kpetrucena.lv/posts/etsi-014-v1-problems/ Quantum Key Delivery (QKD) can detect eavesdropping on a communication channel. ETSI GS QKD 014 helped standardize QKD key delivery northbound API, but its model is too narrow. This post argues that the standard underspecifies SAE identity binding, authorization, key sizing, bulk delivery, and buffering. The Butterfly Protocol: Secure Symmetric Key Exchange and Mutual Authentication via Remote QKD Nodes https://kpetrucena.lv/research/2026-01-the-butterfly-protocol/ Thu, 01 Jan 2026 00:00:00 +0000 https://kpetrucena.lv/research/2026-01-the-butterfly-protocol/ A protocol design for symmetric key exchange and mutual authentication using remote QKD nodes. Integrating Remote Quantum Random Number Generator as a Shared Resource into GNU/Linux via D-Bus https://kpetrucena.lv/research/2025-11-integrating-remote-qrng-dbus/ Sat, 01 Nov 2025 00:00:00 +0000 https://kpetrucena.lv/research/2025-11-integrating-remote-qrng-dbus/ A Linux-first integration of remote QRNG entropy via D-Bus, designed for secure multi-client consumption. An Information-Theoretically Secure QKD Protocol for One-Time Pad Encryption https://kpetrucena.lv/research/2025-10-information-theoretically-secure-qkd-otp/ Wed, 01 Oct 2025 00:00:00 +0000 https://kpetrucena.lv/research/2025-10-information-theoretically-secure-qkd-otp/ A QKD protocol intended for one-time pad usage with information-theoretic security goals. Integration of PQC and QKD: Applications, Challenges and Implementation Frameworks https://kpetrucena.lv/research/2025-10-pqc-and-qkd-integration-framework/ Wed, 01 Oct 2025 00:00:00 +0000 https://kpetrucena.lv/research/2025-10-pqc-and-qkd-integration-framework/ A framework-oriented view on combining PQC and QKD in hybrid quantum-safe systems. Towards Quantum Telecommunications: Point of View of the Implementation Task of the Experimental Quantum Key Distribution Backbone Deployment Project https://kpetrucena.lv/research/2024-12-towards-quantum-telecommunications/ Sun, 01 Dec 2024 00:00:00 +0000 https://kpetrucena.lv/research/2024-12-towards-quantum-telecommunications/ Implementation-centric perspective on deploying an experimental QKD backbone. Hybrid QKD-based framework for secure enterprise communication system https://kpetrucena.lv/research/2024-01-hybrid-qkd-framework-enterprise-communication/ Mon, 01 Jan 2024 00:00:00 +0000 https://kpetrucena.lv/research/2024-01-hybrid-qkd-framework-enterprise-communication/ A hybrid QKD-oriented architecture for enterprise-grade secure communications. Quantum Key Distribution as a Service and Its Injection into TLS https://kpetrucena.lv/research/2023-11-qkd-as-a-service-tls/ Wed, 01 Nov 2023 00:00:00 +0000 https://kpetrucena.lv/research/2023-11-qkd-as-a-service-tls/ A service-oriented approach for injecting QKD key material into TLS workflows.