STEEP -- An Alternative To Quantum Key Distribution
Signal Processing
2025-08-11 v1
Abstract
Secret-message transmission by echoing encrypted probes (STEEP) is discussed as an alternative to quantum key distribution (QKD). The former only needs classic or non-quantum channels while the latter needs both quantum and classic channels for secret-key generation. STEEP is shown to yield a secrecy rate sufficient for one-time pads encryption in many practical situations including in-air channels or undersea optical cables. Other advantages of STEEP over QKD include cost, complexity, compatibility, and robustness against constant eavesdropping.
Cite
@article{arxiv.2508.05882,
title = {STEEP -- An Alternative To Quantum Key Distribution},
author = {Yingbo Hua},
journal= {arXiv preprint arXiv:2508.05882},
year = {2025}
}