Abstract: The present invention describes systems and methods for providing physical layer security. An exemplary embodiment of the present invention provides a method of providing physical layer security involving receiving message data at a pre-processing device in a wireless transmission device. Furthermore, the method of providing physical layer security involves pre-processing the message data into channel data with the pre-processing device and transmitting the channel data from the wireless transmission device over a wireless transmission link having a path loss. Subsequently, the method of providing physical layer security involves receiving the channel data at a post-processing module in a reception device. Additionally, the method involves post-processing the channel data into the message data with the post-processing module, such that an unauthorized reception device is unable to post-process the channel data when a path loss experienced over the transmission link is greater than a predetermined value.