Generalized Kirchhoff Law Johnson Noise (KLJN) secure key exchange system using arbitrary resistors
The Kirchhoff Law Johnson Noise (KLJN) secure key exchange system has been introduced as a simple, very low cost and efficient classical physical alternative to quantum key distribution systems. The ideal system uses only a few electronic components identical resistor pairs, switches and interconnecting wires in order to guarantee perfectly protected data transmission. We show that a generalized KLJN system can provide unconditional security even if it is used with significantly less limitations. The more universal conditions ease practical realizations considerably and support more robust protection against attacks. Our theoretical results are confirmed by numerical simulations.
Scientific reports