Paper 2022/570

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

Onur Gunlu
Rafael F. Schaefer
Holger Boche
H. Vincent Poor

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; and 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.

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Publication info
secure source coding private source coding Gaussian source private key
Contact author(s)
onur guenlue @ uni-siegen de
2022-08-08: revised
2022-05-16: received
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      author = {Onur Gunlu and Rafael F.  Schaefer and Holger Boche and H.  Vincent Poor},
      title = {Secure and Private Source Coding with Private Key and Decoder Side Information},
      howpublished = {Cryptology ePrint Archive, Paper 2022/570},
      year = {2022},
      note = {\url{}},
      url = {}
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