PREDICTION ACCURACY OF BAND-RESTRICTED RANDOM SIGNALS AND SECURITY RISK IN STATISTICAL KEY EXCHANGE
Pao-Lo Liu · Fluctuation and Noise Letters · 2010
Statistical key exchange relies on signals with irreducible randomness to covertly transmit information. Because of causality, there may be disturbances during the transient turn-on, which can pose as a security risk. Linear prediction and the Gerchberg–Papoulis methods are used to analyze the risk quantitatively. With properly generated signals, the probability of leak during the transient turn-on is found to be comparable to that of the steady state. The transient signal does not pose as an additional security risk.