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A secure analog speech scrambler using the discrete cosine transform

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Advances in Cryptology — ASIACRYPT '91 (ASIACRYPT 1991)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 739))

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Abstract

A secure technique for analog speech encryption is described which uses the Discrete Cosine Transform (DCT). The paper shows how the proposed technique overcomes weaknesses identified in other analog scramblers by using transform domain permutation and the insertion of dummy transform components. It is shown that the DCT scrambler with dummy spectrum insertion offers a similar level of security to a digital scrambler on a bandlimited channel while providing better quality of recovered speech.

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Author information

Authors and Affiliations

  1. School of Electrical and Electronic Systems Engineering, Queensland University of Technology, GPO Box 2434, 4001, Brisbane, Queensland, Australia

    B. Goldburg

  2. School of Mathematics and Information Security Research Centre, Queensland University of Technology, GPO Box 2434, 4001, Brisbane, Queensland, Australia

    E. Dawson

  3. School of Electrical Engineering, University of Technology Sydney, 2001, Sydney, New South Wales, Australia

    S. Sridharan

Authors
  1. B. Goldburg
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  2. E. Dawson
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  3. S. Sridharan
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Editor information

Hideki Imai Ronald L. Rivest Tsutomu Matsumoto

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© 1993 Springer-Verlag Berlin Heidelberg

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Goldburg, B., Dawson, E., Sridharan, S. (1993). A secure analog speech scrambler using the discrete cosine transform. In: Imai, H., Rivest, R.L., Matsumoto, T. (eds) Advances in Cryptology — ASIACRYPT '91. ASIACRYPT 1991. Lecture Notes in Computer Science, vol 739. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-57332-1_25

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  • DOI: https://doi.org/10.1007/3-540-57332-1_25

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-57332-6

  • Online ISBN: 978-3-540-48066-2

  • eBook Packages: Springer Book Archive

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