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Convolutional encoding for Wyner's wiretap channel (Corresp.)

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2 Author(s)

The wiretap channel introduced by Wyner is studied for the special case when the main channel is a noiseless binary channel and the wiretap channel is a binary symmetric channel. With a rate-one convolutional encoder, the steady-state uncertainty of the wiretapper is shown to depend only on the constraint length v of the code, not on the specific taps, and is complete on k successive bits provided k\leq v . During the initial transient period, the rate of growth of uncertainty does depend on the tap connections of the shift register.

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Information Theory, IEEE Transactions on  (Volume:25 ,  Issue: 2 )