Publications

@conference{javierblanco005,

title = {QKD-KEM: Hybrid QKD Integration into TLS with OpenSSL Providers},

author = {Javier Blanco-Romero and Pedro Otero-Garcia and Daniel Sobral-Blanco and Florina Almenares-Mendoza and Ana Fernandez-Vilas and Rebeca Diaz-Redondo},

doi = { https://doi.org/10.48550/arXiv.2503.07196},

year  = {2025},

date = {2025-03-10},

urldate = {2025-03-10},

abstract = {Quantum Key Distribution (QKD) promises information-theoretic security, yet integrating QKD into existing protocols like TLS remains challenging due to its fundamentally different operational model. In this paper, we propose a hybrid QKD-KEM protocol with two distinct integration approaches: a client-initiated flow compatible with both ETSI 004 and 014 specifications, and a server-initiated flow similar to existing work but limited to stateless ETSI 014 APIs. Unlike previous implementations, our work specifically addresses the integration of stateful QKD key exchange protocols (ETSI 004) which is essential for production QKD networks but has remained largely unexplored. By adapting OpenSSL’s provider infrastructure to accommodate QKD’s pre-distributed key model, we maintain compatibility with current TLS implementations while offering dual layers of security. Performance evaluations demonstrate the feasibility of our hybrid scheme with acceptable overhead, showing that robust security against quantum threats is achievable while addressing the unique requirements of different QKD API specifications.},

keywords = {I-Shaper, OpenSSL, Post-Quantum Cryptography, PQC, QKD, Qursa, TLS},

pubstate = {published},

tppubtype = {conference}

}

@conference{javierblanco002,

title = {Integrating Post-Quantum Cryptography into CoAP and MQTT-SN Protocols},

author = {Javier Blanco-Romero and Vicente Lorenzo and Florina Almenares and Daniel Díaz-Sánchez and and Celeste Campo and Carlos García-Rubio},

url = {https://ieeexplore.ieee.org/abstract/document/10733716/figures#figures},

doi = {https://doi.org/10.1109/ISCC61673.2024.10733716},

isbn = {979-8-3503-5424-9},

year  = {2024},

date = {2024-10-31},

urldate = {2024-10-31},

booktitle = {2024 IEEE Symposium on Computers and Communications (ISCC)},

publisher = {IEEE},

abstract = {Post-Quantum Cryptography (PQC) is a practical and cost-effective solution to defend against emerging quantum computing threats. So, leading worldwide security agencies and standardization bodies strongly advocate for the proactive integration of PQ cryptography into underlying frameworks to support applications, protocols, and services. The current research predominantly addresses the incorporation of PQC in Internet communication protocols such as HTTP and DNS; nevertheless, the focus on embedded devices has been limited to evaluating PQC’s integration within TLS/DTLS in isolation. Hence, there is a notable gap in understanding how PQC impacts IoT-specific communication protocols. This paper presents the integration of PQC into two communication protocols specifically tailored for IoT devices, the Constrained Application Protocol (CoAP) and MQTT for Sensor Networks (MQTT-SN), via the wolfSSL library. These two integrations contribute to the understanding of PQC’s implications for IoT communication protocols.},

keywords = {coap, compromise, cryptography, I-Shaper, IoT, MQTT-SN, Post-Quantum Cryptography, PQC, Protocols, Qursa},

pubstate = {published},

tppubtype = {conference}

}