Quantum-Seeded Distributed Post-Quantum Group Signatures for 5G V2X Communications
Abstract
Vehicle-to-Everything (V2X) communications rely on elliptic-curve signatures that a quantum adversary breaks and on pseudonym certificates whose anonymity rests on rotation rate, not cryptography. This work presents qDGSP, a post-quantum V2X infrastructure: a hash-based dynamic group signature scheme (DGSP, over SPHINCS+ and WOTS+) distributed between a central controller and roadside verifiers. Group keys derive deterministically from quantum key distribution (QKD) seeds served over the ETSI GS QKD 014 interface, so no group-signature secret crosses the classical channel. qDGSP-EA (Ephemeral Association) binds an ephemeral ML-DSA-65 key to one group signature per 5G cell: messages remain unlinkable across cells, linkable within one. On a testbed with emulated 5G links, median end-to-end latency stayed within the 100ms ETSI budget for every variant. The qDGSP-EA intra-cell DENM matched the NIST ML-DSA-65 baseline on the wire, and under load EA mode raised delivery from roughly 78% to 93%.
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BibTeX
@misc{blancocasal2026quantumseeded,
title = {{Quantum-Seeded Distributed Post-Quantum Group Signatures for 5G V2X Communications}},
author = {P. Blanco-Casal and P. Rejo-Iglesias and D. Cajaraville-Aboy and J. Vecino-Peñas and R. P. Díaz-Redondo and A. Fernández-Vilas and M. Fernández Veiga},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.27316},
eprint = {2610.27316},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.27316},
}
RIS
TY - UNPB
TI - Quantum-Seeded Distributed Post-Quantum Group Signatures for 5G V2X Communications
AU - P. Blanco-Casal
AU - P. Rejo-Iglesias
AU - D. Cajaraville-Aboy
AU - J. Vecino-Peñas
AU - R. P. Díaz-Redondo
AU - A. Fernández-Vilas
AU - M. Fernández Veiga
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.27316
UR - https://arxiv.org/abs/2610.27316
AB - Vehicle-to-Everything (V2X) communications rely on elliptic-curve signatures that a quantum adversary breaks and on pseudonym certificates whose anonymity rests on rotation rate, not cryptography. This work presents qDGSP, a post-quantum V2X infrastructure: a hash-based dynamic group signature scheme (DGSP, over SPHINCS+ and WOTS+) distributed between a central controller and roadside verifiers. Group keys derive deterministically from quantum key distribution (QKD) seeds served over the ETSI GS QKD 014 interface, so no group-signature secret crosses the classical channel. qDGSP-EA (Ephemeral Association) binds an ephemeral ML-DSA-65 key to one group signature per 5G cell: messages remain unlinkable across cells, linkable within one. On a testbed with emulated 5G links, median end-to-end latency stayed within the 100ms ETSI budget for every variant. The qDGSP-EA intra-cell DENM matched the NIST ML-DSA-65 baseline on the wire, and under load EA mode raised delivery from roughly 78% to 93%.
ER -