Thresholding attack on the BSS-based cryptosystem which has binary key
Ali Sadr, Raziyeh Sadat Okhovat · International Journal of Electronic Security and Digital Forensics · 2014
In this paper, it has been shown that the BSS-based cryptosystem with binary key which has only two values, does not provide the security goal. In fact, the private key can be fully realised by applying a proper threshold on the encrypted signal. Performance analysis in terms of normalised MSE shows that the original signal can be accurately extracted by the proposed procedure from the encrypted one. Therefore, a key with multiple values has been exploited to enhance the security of the cryptosystem.