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Secret Communication with Feedback

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Abstract

Secure communication with feedback is studied. An achievability scheme in which the backward channel is used to generate a shared secret key is proposed. The scenario of binary symmetric forward and backward channels is considered, and a combination of the proposed scheme and Maurer's coding scheme is shown to achieve improved secrecy rates. The scenario of a Gaussian channel with perfect output feedback is also analyzed and the Schalkwijk-Kailath coding scheme is shown to achieve the secrecy capacity for this channel.

Most cited references5

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Secret key agreement by public discussion from common information

(1993)
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Common randomness in information theory and cryptography. I. Secret sharing

(1993)
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The General Gaussian Multiple-Access and Two-Way Wiretap Channels: Achievable Rates and Cooperative Jamming

(2008)
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Numerical methods, Information systems & theory