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In this paper, we assess the behavior of some low-density parity-check (LDPC) code design techniques over the additive white Gaussian (AWGN) wire-tap channel, in terms of security gap. We consider the progressive edge growth (PEG) construction algorithm as a reference, and compare its performance with that of four approaches for designing structured LDPC codes. We consider both systematic and non-systematic...
In this paper, we carry out a practical assessment of the performance of finite-length LDPC codes over the wiretap channel with fast Rayleigh fading. Classical metrics for physical layer security, like the secrecy capacity, are based on information theoretic arguments, and provide the ultimate security bounds for these schemes. However, it is difficult to design practical schemes, using some specific...
Using the error rate as a metric is useful for assessing the performance of actual transmission schemes from the physical layer security viewpoint. The security gap concept has been used over the additive white Gaussian noise channel as a practical measure for combined reliability and security. In this paper, the definition of security gap is extended to a wire-tap channel with fast fading. Our aim...
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