Generalized coset schemes for the wire-tap channel: application to biometrics

This paper discusses the generalised coset schemes for the wire-tap channel and its application to biometrics. The main contribution to this problem is threefold:1) information-theoretic approach and model the situation by involving wire-tap channel models, 2) generalisation of Wyner´s coset coding scheme to the case when both the main channel and the wiretap channel are noisy, 3) complete solution to the original problem by making use of LDPC codes, with low decoding complexity. This paper also prove that this scheme i.e., the use of linear codes, achieve the Shannon-capacity of the system.