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Exploration of Simple Audio Cryptography Schemes in Time Domain and Frequency Domain

Visual cryptography is a cryptographic technique which allows visual information to be encrypted in such a way that the decryption can be performed by the human visual system, without the aid of computers. Similarly, audio cryptography is a cryptographic technique which allows audible information to be encrypted in such a way that the decryption can be performed by the human auditory system, without the aid of computers. This idea is an extension of visual cryptography. Several paper has been found to implement Audio Secret Sharing (ASS) schemes. Audio Secret Sharing in 2-out-of-2 has been widely used, by using a cover sound. This paper will explain about the author’s exploration of another possible simple audio cryptography schemes in 2-out-of-2 schemes.