Cryptology ePrint Archive: Report 2022/221

Secure Joint Communication and Sensing

Onur Gunlu and Matthieu Bloch and Rafael F. Schaefer and Aylin Yener

Abstract: This work considers mitigation of information leakage between communication and sensing operations in joint communication and sensing systems. Specifically, a discrete memoryless state-dependent broadcast channel model is studied in which (i) the presence of feedback enables a transmitter to simultaneously achieve reliable communication and channel state estimation; (ii) one of the receivers is treated as an eavesdropper whose state should be estimated but which should remain oblivious to a part of the transmitted information. The model abstracts the challenges behind security for joint communication and sensing if one views the channel state as a characteristic of the receiver, e.g., its location. For independent identically distributed (i.i.d.) states, perfect output feedback, and when part of the transmitted message should be kept secret, a partial characterization of the secrecy-distortion region is developed. The characterization is exact when the broadcast channel is either physically-degraded or reversely-physically-degraded. The characterization is also extended to the situation in which the entire transmitted message should be kept secret. The benefits of a joint approach compared to separation-based secure communication and state-sensing methods are illustrated with a binary joint communication and sensing model.

Category / Keywords: foundations / joint communication and sensing, physical layer security, secrecy region, information theoretic security, partial secrecy

Date: received 22 Feb 2022

Contact author: onur guenlue at uni-siegen de

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Version: 20220225:074848 (All versions of this report)

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