Abstract
Speech is probably the most fundamental form of communication available to us and our society has become highly dependent on our modern, fast and accurate means of transmitting spoken messages. Usually the main aim of communicants is merely to trasmit a message as quickly, accurately and cheaply as possible. There are, however, a number of situations where the information is confidential and where an interceptor might be able to benefit immensely fromt he knowledge gained by monitoring the information circuit. In such situations the communicants must take steps to conceal and protect the content of their spoken message. Of course, the amount of protection will vary. On occasions it is sufficient to prevent a casual ‘listener’ from understanding the message but there are other times when it is crucial that even a determined interceptor must not be able to deduce ti.
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7. References
Beker, H.J and Mitchell, C.J. ‘Permutations with restricted displacement’, to be submitted.
Beker, H. J. and Piper, F.C. ‘Cipher Systems: The protection of communications’, Northwood Books (1982).
Bromfield, A.J. and Mitchell, C.J. ‘Permutation selector for a sliding window time element scrambler’, to be submitted.
MacKinnon, N.R.F., ‘The development of speech encipherment’, Radio and Elect. Eng. Vol 50, No 64, 1980, 147–155.
Telsy Systems, ‘Secure Voice: Reality or myth’ (1979)
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© 1983 Springer-Verlag Berlin Heidelberg
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Beker, H.J. (1983). Analogue Speech Security Systems. In: Beth, T. (eds) Cryptography. EUROCRYPT 1982. Lecture Notes in Computer Science, vol 149. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-39466-4_7
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DOI: https://doi.org/10.1007/3-540-39466-4_7
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