Watermark-based secure communications in safety-related scenarios

The technological innovation has enabled the spread of safety-related systems in many domains, such as public transport, energy, and medical devices. In these applications, security is one of the primary concerns. This paper proposes a watermark-based blind physical layer security (WBPLSec) utilizing a jamming receiver in conjunction with spread spectrum watermarking technique. The outage probability of the secrecy capacity is analytically derived, regardless of the eavesdropper position. Results indicate the WBPLSec a valuable technique for deploying physical layer security creating a secure region around the receiver, such as the legitimate medical device.