Systems and methods for authentication using antenna array geometries

A method for authenticating receiving devices comprising:

• introducing error into an antenna array of a transmitting device to create a chaotic antenna array of the transmitting device;
• causing the transmitting device to transmit a signal to a receiving device using the chaotic antenna array;
• determining a difference between a reference signal and the transmitted signal by the receiving device;
• using the determined difference as a signature for the chaotic antenna array of the transmitting device;
• adding the signature to a list of signatures, wherein each signature in the list of signatures is associated with a different transmitting device of a plurality of transmitting devices, wherein each transmitting device is associated with a different chaotic antenna array;
• and
• distributing the list of signatures to a plurality of receiving devices to use to authenticate transmitting devices.

A receiving device comprising:

• an antenna;
• a storage comprising a plurality of signatures, wherein each signature is associated with a trusted transmitting device of a plurality of trusted transmitting devices;
• and
• at least one processor that:
• receives a signal from a chaotic antenna array of a transmitting device;
• determines a difference between a reference signal and the received signal;
• uses the determined difference as a signature for the chaotic antenna array of the transmitting device;
• compares the signature to the plurality of signatures;
• based on the comparison, determines whether the signature matches any signature of the plurality of signatures;
• and
• if it is determined that the signature matches any signature of the plurality of signatures, authenticate the transmitting device as a trusted transmitting device.