Arraymetrics: Authentication Through Chaotic Antenna Array Geometries
This addresses the need for multi-factor authentication in computing by combining cryptographic and physical keys, though it appears incremental as it builds on existing signal and antenna methods.
The paper tackles authentication by using perturbed antenna array geometries as a physical key, achieving a 1% false authentication rate at 10 dB SNR and less than 1% missed authentication rates.
Advances in computing have resulted in an emerging need for multi-factor authentication using an amalgamation of cryptographic and physical keys. This letter presents a novel authentication approach using a combination of signal and antenna activation sequences, and most importantly, perturbed antenna array geometries. Possible degrees of freedom in perturbing antenna array geometries affected physical properties and their detection are presented. Channel estimation for the plurality of validly authorized arrays is discussed. Accuracy is investigated as a function of signal-to-noise ratio (SNR) and number of authorized arrays. It is observed that the proposed authentication scheme can provide 1% false authentication rate at 10 dB SNR, while it is achieving less than 1% missed authentication rates.