Date Added: Dec 2009
The wiretap channel model, proposed by Wyner, has been studied by various authors from the perspectives of security, reliability and cryptographic protocols. A basic theme of these discussions has been information theoretically secure communication whose degree of secrecy can be theoretically proved. This paper explains a practical implementation of Euclidean Geometry (EG) - Low Density Parity Check (LDPC) codes for wiretap channels of type I and II. The focus has been on efficient encoding and decoding by taking advantage of the cyclic nature of EG codes.