Noise properties in the ideal Kirchhoff-Law-Johnson-Noise secure communication system
This work addresses the security of communication systems for users relying on KLJN key distribution, but it appears incremental as it builds on prior physical law-based proofs to analyze real implementations.
The paper tackles the problem of determining the noise properties required for unconditional security in the ideal Kirchhoff-Law-Johnson-Noise (KLJN) secure key distribution system, finding that simple statistical analysis can answer whether other noise sources and resistor values beyond Johnson-like noise and resistors are viable.
In this paper we determine the noise properties needed for unconditional security for the ideal Kirchhoff-Law-Johnson-Noise (KLJN) secure key distribution system using simple statistical analysis. It has already been shown using physical laws that resistors and Johnson-like noise sources provide unconditional security. However real implementations use artificial noise generators, therefore it is a question if other kind of noise sources and resistor values could be used as well. We answer this question and in the same time we provide a theoretical basis to analyze real systems as well.