Physical layer key negotiation attacks and detection under a static environment

The existing physical layer key generation methods overly rely on the results of channel probing, which not only weakens the randomness of the key in a static environment but also makes the physical layer key vulnerable to active attacks. At the same time, in terms of defence technology, traditional physical layer intrusion detection methods mainly focus on the abnormal transmission of physical signals, making it difficult to identify potential key attack behaviours. This article proposes an attack method for the random operator-based key negotiation model in a static environment and then proposes a key attack detection scheme that utilizes the correlation between pilot signals and random signals for the above two attack behaviours. Under low false alarm rate conditions, this detection scheme has a higher detection rate compared to traditional physical layer intrusion detection methods.