Secure Cooperative Source-Coding With Side Information at the Eavesdropper

In the secure cooperative source-coding problem that we consider, Encoder 1 and Decoder 1 observe, respectively, a pair of independent identically distributed (i.i.d.) correlated sources and wish to communicate the first source to Decoder 2 subject to a distortion constraint. Encoder 1 sends a messa...

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Vydané v:IEEE transactions on information theory Ročník 62; číslo 8; s. 4544 - 4558
Hlavný autor: Bross, Shraga I.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.08.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Channels
Coders
Codes
Cooperation
cooperative transmission
Correlation
Correlation analysis
Decoders
Decoding
Distortion
Electronic eavesdropping
Encoders
Information theory
Loss measurement
Measurement uncertainty
Messages
Secure multi-terminal source coding
Source coding
Uncertainty
ISSN:0018-9448, 1557-9654
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Shrnutí:In the secure cooperative source-coding problem that we consider, Encoder 1 and Decoder 1 observe, respectively, a pair of independent identically distributed (i.i.d.) correlated sources and wish to communicate the first source to Decoder 2 subject to a distortion constraint. Encoder 1 sends a message to both the decoders over a public nonsecure channel, and then Decoder 1-the helper-sends a message just to Decoder 2 over a secure channel. An eavesdropper, which has access to memoryless side-information that is correlated with the first source, intercepts the message sent by Encoder 1 and based on both wishes to minimize its uncertainty about the first source. The secrecy measure of the system is the equivocation of the first source at the eavesdropper. We determine the rates equivocation region for this problem assuming that conditioned on the side-information of Decoder 1 the eavesdropper's side-information is independent of the first source. To that end, we derive an inner and an outer bound that depend explicitly on the proportional rate that Encoder 1 spends in the cooperation process. Subsequently, we evaluate this region for the case of a doubly symmetric binary source and Hamming distortion.
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ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2016.2572727