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The paper describes a reconciliation procedure for physical key generation based on specially designed LDPC codes using Slepian-Wolf-type coding. The LDPC codes are optimized for intrinsic information with two different noise variances within the same codeword. Physical layer security strategies exploit the randomness of wireless channels, which can highly strengthen the security of wireless communications. In this paper, the authors consider the problem of designing channel codes for sharing and protecting trustful information between the legitimate users based on Low Density Parity Check (LDPC) codes.
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