Ramalingam, J.Rath, S.Kuppusamy, L.Lee, C.-C.2026-02-032024Computers and Electrical Engineering, 2024, 120, , pp. -457906https://doi.org/10.1016/j.compeleceng.2024.109721https://idr.nitk.ac.in/handle/123456789/20799While quantum key distribution (QKD) offers unparalleled security in communication, its real-world application is hindered by inherent physical constraints. The challenge lies predominantly in the cumbersome, energy-intensive nature of current QKD systems, which stems largely from the time-intensive post-processing stage. This paper investigates the feasibility of offloading the computationally intensive post-processing tasks, specifically focusing on information reconciliation (IR), to potentially untrusted servers. We present a novel scheme that leverages syndrome decoding techniques to efficiently transfer the IR step of QKD protocols to a single external server. Notably, this offloading is accomplished while maintaining the highest level of security, known as unconditional security. The proposed technique is bolstered by a comprehensive theoretical analysis and validated through experimental trials. These findings demonstrate the effectiveness of our approach in bridging the gap between the theoretical promise of QKD and its real-world deployment. © 2024 Elsevier LtdDecodingEnergyInformation reconciliationKey distributionLDPCPhysical constraintsPost-processingQuantum keyReal-worldSecure offloadingSyndrome decoding