Blind recognition of parameters of linear block codes from intercepted bit stream

This paper presents a probabilistic approach for blind recognition of the parameters of unknown error correcting codes and alignment of bitstream by analyzing intercepted bit stream. This approach can be used for standard as well as nonstandard binary linear systematic error correcting codes. It is a challenging task to identify the error correcting schemes used by the sender to extract the message by adversary. This technique is useful for the analysis of intercepted communication signals in noncooperative context. The proposed method works for linear block codes even at large bit error rate. Our method has been validated through simulation on MATLAB.