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Secure Source Coding with a Public Helper.

Kittipong Kittichokechai1, Yeow-Khiang Chia2, Tobias J Oechtering1

  • 1School of Electrical Engineering and the ACCESS Linnaeus Center, KTH Royal Institute of Technology, Sweden.

IEEE Transactions on Information Theory
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Summary
This summary is machine-generated.

This study explores secure multi-terminal source coding with a public helper, analyzing information leakage to eavesdroppers. It defines the trade-off between transmission rate, distortion, and leakage for secure data transmission.

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Area of Science:

  • Information Theory
  • Cybersecurity
  • Network Coding

Background:

  • Secure multi-terminal source coding is crucial for distributed systems.
  • The role of a public helper in secure communication introduces unique challenges.
  • Information leakage from helper nodes is a significant security concern.

Purpose of the Study:

  • To investigate secure multi-terminal source coding problems with a public helper.
  • To analyze scenarios involving eavesdropping on helper information and triangular setups.
  • To characterize the rate-distortion-leakage trade-off under helper constraints.

Main Methods:

  • Formulation of secure source coding problems with a public helper.
  • Analysis of two scenarios: eavesdropping on helper output and triangular source coding.
  • Derivation of the rate-distortion-leakage region for various problem classes.

Main Results:

  • Characterization of the achievable rate-distortion-leakage region.
  • Quantification of the trade-off between transmission rate, distortion, and leakage.
  • Understanding the impact of helper's public nature on secure transmission.

Conclusions:

  • The public helper's role can be optimized to balance support and security.
  • The derived rate-distortion-leakage region provides fundamental limits for secure coding.
  • This work offers insights into designing secure distributed communication systems.