Secrecy coding for the wiretap channel using best known linear codes

A special case of wiretap channel is studied and analysed when the main channel is an error free channel and the eavesdropper channel is a binary symmetric channel. The goal of this work is to maximise the equivocation on the eavesdropper side by using a combination of the technique of the McEliece cryptosystem using Best Known Linear Codes(BKLC) coupled with syndrome coding. It is shown that as a result the communication security is improved. In this paper, two Best known linear codes are analysed which increase the equivocation on the eavesdropper side. Two encoding stages are employed. The first stage employs a syndrome coding scheme based on the (23,12,7) binary Golay code and the second stage employs the McEliece cryptosystem technique using BKLC. Analysis shows that the arrangement reduces the information leakage to the eavesdropper compared to previously published schemes.