Quantization noise in statistical key exchange

Ideally, signals in statistical key exchange should be band-limited to prevent leak. During digitization, however, the broadband quantization noise gets incorporated. In this study, the security risk posed by the quantization noise is analyzed. The SavitzkyGolay filtering technique is used to reduce the quantization noise. Although the noise can be reduced, it cannot be eliminated. Legitimate users must take evasive measures. The adversary can perform exhaustive search. Once how signals are processed is identified, the security can be breached.