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The security problem of Gaussian MIMO (multipleinputs multiple-outputs) channel is considered where a transmitter is communicating to a receiver in the presence of an eavesdropper. All the nodes are equipped with multiple antennas. Through utilizing some of the available power to produce ‘artificial noise’ that only degrades the eavesdropper’s channel, the transmitter ensures the security of communication. However, the artificial noise could be void possibly due to the inherent security weakness. In this paper, the vulnerability of the MIMO wireless channel with artificial noise (MIMOAN) through matrix analysis is researched. Then a Matrix Blind Space Elimination (MBSE) scheme is proposed and proved to fix the design flaw in order to strengthen the original one. Keywords-Security; wireless; secrecy capacity; artificial noise; MIMO; MBSE

Research on the Vulnerability of MIMO Secrecy using AN Matrix Blind Space Elimination