Systems and methods of secure coding for physical layer communication channels

摘要

Systems and methods of securely communicating from a sender device to a receiver device on a communication channel are disclosed. One disclosed method is for securely communicating from a sender device to a receiver device on a main channel when an eavesdropper device is listening on an eavesdropper channel. The main channel has an signal-to-noise ratio SNRM, and the eavesdropper channel has a signal-to-noise ratio SNRE. The method comprises encoding a message at a physical layer with a secure error correcting code (SECC) to produce an encoded message, and transmitting the encoded message on the main channel. The SECC has a set of defined characteristics such that when the eavesdropper device is more than a predetermined distance Z from the sender, at least a predefined fraction of the message is unreliable, where the predefined fraction of unreliable bits renders the eavesdropper unable to reliable decode messages on the main channel.

主权项

1. A method for securely communicating from a sender device to a receiver device on a main channel when an eavesdropper device is listening on an eavesdropper channel, the method comprising:
encoding a message with a secure error correcting code (SECC) to produce an encoded message, the SECC having a set of defined characteristics that cause a bit error rate (BER) on the main channel to be lower than a first threshold BER value and cause a BER on the eavesdropper channel to be higher than a second threshold BER value when a distance between the eavesdropper device and the sender device is greater than the distance between receiver devices and the sender device, wherein the second threshold BER value is greater than the first threshold BER value; and transmitting the encoded message on the main channel, wherein the SECC has the set of defined characteristics such that when the eavesdropper device is more than a predetermined distance Z from the sender, at least a predefined fraction of the message is unreliable, where the predefined fraction of unreliable bits renders the eavesdropper unable to reliably decode messages.