Nonbinary audio cryptography
(2000) 3rd International Workshop on Information Hiding (IH 99) — Location: DRESDEN(Germany) (29.September.1999)
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- Abstract
- Visual cryptography, introduced by Naor-Shamir at Eurocrypt '94, only requires primitive technology to decrypt the ciphertext. However, a disadvantage of it is that the "ciphertext", as a random looking transparency, is suspicious to a censor. The solutions recently proposed by Desmedt-Hou-Quisquater to avoid these problems are neither user friendly, having a low bandwidth, nor are tested. In this paper we present three schemes that overcome these problems. As in one of the Desmedt-Hou-Quisquater's schemes, a share (or a ciphertext) corresponds to an audio signal, such as music. While in the Desmedt-Hou-Quisquater scheme the plaintext was binary, in our schemes the plaintext can also be speech, or any other audio signal. By introducing variations of the one-time pad we guarantee perfect secrecy. The ciphertext is nonsuspicious, when tested with human ears, is indistinguishable from normal music.
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Citations
Desmedt, Y., Quisquater, J.-J., & Le, T. (2000). Nonbinary audio cryptography. Lecture Notes in Computer Science, 1768, 478-489. https://doi.org/10.1007/10719724_33 (Original work published 2000)