Secure and Private Source Coding with Private Key and Decoder Side Information

• URL: http://arxiv.org/abs/2205.05068v1
• Date: Tue, 10 May 2022 17:51:28 GMT
• Title: Secure and Private Source Coding with Private Key and Decoder Side Information
• Authors: Onur G\"unl\"u, Rafael F. Schaefer, Holger Boche, and H. Vincent Poor
• Abstract summary: The problem of secure source coding with multiple terminals is extended by considering a remote source whose noisy measurements are correlated random variables. The main additions to the problem include 1) all terminals noncausally observe a noisy measurement of the remote source; 2) a private key is available to all legitimate terminals; 3) the public communication link between the encoder and decoder is rate-limited; 4) the secrecy leakage to the eavesdropper is measured with respect to the encoder input, whereas the privacy leakage is measured with respect to the remote source.
• Score: 139.515333493829
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The problem of secure source coding with multiple terminals is extended by considering a remote source whose noisy measurements are the correlated random variables used for secure source reconstruction. The main additions to the problem include 1) all terminals noncausally observe a noisy measurement of the remote source; 2) a private key is available to all legitimate terminals; 3) the public communication link between the encoder and decoder is rate-limited; 4) the secrecy leakage to the eavesdropper is measured with respect to the encoder input, whereas the privacy leakage is measured with respect to the remote source. Exact rate regions are characterized for a lossy source coding problem with a private key, remote source, and decoder side information under security, privacy, communication, and distortion constraints. By replacing the distortion constraint with a reliability constraint, we obtain the exact rate region also for the lossless case. Furthermore, the lossy rate region for scalar discrete-time Gaussian sources and measurement channels is established.

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