Proposal for Secure Open RAN through Cryptographic Quantum Key Distribution in Software-Defined QKD Networks

• Fernando N. N. Farias RNP http://orcid.org/0000-0003-0354-9544
• Diego Abreu UFPA https://orcid.org/0000-0001-9221-7853
• Antônio J. G. Abelém UFPA https://orcid.org/0000-0003-4085-6674

DOI: https://doi.org/10.5753/wqunets.2025.9504

Abstract

This article proposes the integration of the Open RAN architecture with software-defined Quantum Key Distribution (QKD) networks to enhance the security of cryptographic key exchanges. The initiative introduces a service layer, called O‑QKDN, which automates key transfer through quantum channels, mitigating vulnerabilities inherent in conventional methods. The architecture integrates QKD nodes near Open RAN components and employs SDN to orchestrate key distribution in critical channels, such as Fronthaul links and the connection between DU and CU, while remaining compliant with O‑RAN Alliance specifications.

Keywords: OpenRAN, QKD, Quantum Networks, Quantum Key Distribution

References

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