Deterministic Random Number Generator Attack Against the Kirchhoff-Law-Johnson-Noise Secure Key Exchange Protocol

This paper demonstrates the vulnerability of Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchanger to compromised random number generator(s) even if these numbers are used solely generate noises emulating Johnson noise Alice's and Bob's resistors. The attacks shown deterministic in sense that Eve's knowledge and/or is basically deterministic. Moreover, no statistical evaluation needed, except for rarely occurring events negligible, waiting time verification time. We explore two situations. In first case, Eve knows both noises. show that, this situation, can quickly crack bit by using Ohm's Law. other only noise. Then learn resistance value Therefore, she will have same as Bob, thus at end exchange period, know bit.