Computer Science – Information Theory
Scientific paper
2011-03-21
Computer Science
Information Theory
submitted to IEEE GLOBECOM 2011 - Communication Theory Symposium
Scientific paper
A coding scheme based on irregular low-density parity-check (LDPC) codes is proposed to send secret messages from a source over the Gaussian wiretap channel to a destination in the presence of a wiretapper, with the restriction that the source can send only binary phase-shift keyed (BPSK) symbols. The secrecy performance of the proposed coding scheme is measured by the secret message rate through the wiretap channel as well as the equivocation rate about the message at the wiretapper. A code search procedure is suggested to obtain irregular LDPC codes that achieve good secrecy performance in such context.
Shea John M.
Wong Chan Wong
Wong Tan F.
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