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Title:
Secure and Private Source Coding with Private Key and Decoder Side Information
Authors: Onur Gunlu, Rafael F. Schaefer, Holger Boche, H. Vincent Poor
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) public communication link between the encoder and decoder is rate-limited; 4) secrecy leakage to the eavesdropper is measured with respect to the encoder input, whereas 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 channels is established.
ePrint: https://eprint.iacr.org/2022/570
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