The crypto-aided physical layer integrity check in cooperative relaying communication
Xudong Liu · 2015
In the cooperative relaying communication, the system has to defend itself against the eavesdropper which may undermines the message integrity by sending the modified messages. We propose a physical layer integrity check scheme for cooperative relaying communication, where a source broadcast the signals to both destination target and an untrustworthy relay node. The approach exploits physical layer signals in detecting the modified messages conducted by the relay. We develop a scheme that utilizes a few cryptography information in the initial message packets to estimate the optimal detecting threshold. By applying the optimal detecting method, the proposed approach achieves almost same performance provided by perfect cryptography strategy that can detect all the modified messages but with high computational cost caused by applying cryptographic encryption to all the transmitted messages.