Abstract: The encrypted techniques present knowledge of encryption. A study of a new secure audio encryption and decryption technique is proposed here. A multidimensional key is generated then the selected audio samples are converted to binary format then in this technique, audio is sampled using orthogonal frequency division multiplexing (OFDM). Then the sample bits are swapped and the regenerated samples are filled into the orthogonal matrix. Thus a resultant encrypted audio wave is created. At the receiver and the same procedure is used to perform the decryption. The new technique is employing more security to the audio data file. Therefore, a more encrypted audio wave is obtained using this proposed technique.

Keywords: OFDM, encryption, orthogonal matrix, multidimensional key etc.