This study investigates a duality approach to information leak detection in the generalized Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange scheme. While previous work by Chamon and Kish sampled voltages at zero-current instances, this research explores sampling currents at zero-voltage crossings. The objective is to determine if this dual approach can reveal information leaks in non-equilibrium KLJN systems. Results indicate that the duality method successfully detects information leaks, further supporting the necessity of thermal equilibrium for unconditional security in KLJN systems.
View on arXiv@article{flanery2025_2505.00858,
title={ Duality on the Thermodynamics of the Kirchhoff-Law-Johnson-Noise (KLJN) Secure Key Exchange Scheme },
author={ Sarah Flanery and Anson Trapani and Christiana Chamon and Leyla Nazhandali },
journal={arXiv preprint arXiv:2505.00858},
year={ 2025 }
}