Most of the existing physical layer encryption algorithms setting and security analysis are carried out on baseband,ignoring the threat of spectrum leakage to the security of the algorithm. On the basis of analyzing the spectrum characteristics of Orthogonal Frequency Division Multiplexing( OFDM) signal,a spectrum analysis attack method is designed. By establishing a one-to-one correspondence between the information or key symbol and the frequency component of the ciphertext spectrum,the information,key and...
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