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Secrecy improvement in confidential coherence modulation by means of a new keying structure

By Bruno Wacogne, W. Elflein, C. Pieralli, P. Mollier, H. Porte and David A. Jackson

Abstract

In this paper, we present a new keying structure which enhances the secrecy of an already relatively secure coherence modulation method we developed recently. The originality of the method consists in using an encrypting key composed of a large amplitude - low frequency part and a low amplitude - high frequency part. These two components ensure that the spectrum, as well as the signal tapped by an eavesdropper, are efficiently corrupted. When the key is applied simultaneously to both the encoder and the decoder. the signal is correctly restored. Both theoretical aspects and experimental confirmations are presented in this paper

Topics: QC
Publisher: Elsevier Science BV, PO Box 211, 1000 AE Amsterdam, Netherlands
Year: 1998
DOI identifier: 10.1016/s0030-4018(98)00294-6
OAI identifier: oai:kar.kent.ac.uk:17236
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