FIELD: physics; communications.
SUBSTANCE: invention relates to a novel method of embedding a watermark into an information signal, according to which an information signal (12) is first converted from time-domain presentation (22) to spectral/modulation spectral presentation (30). The information signal is then keyed in the spectral/modulation spectral presentation (30) depending on the watermark (14) which should be embedded so as to obtain a modified spectral/modulation spectral presentation, and the watermark embedded signal (16) is then formed based on the modified spectral/modulation spectral presentation.
EFFECT: prevention of traditional correlation attacks which are used in watermark methods based on modulation with frequency widening, resulting from that, the watermark (14) is embedded and/or obtained in spectral/modulation spectral presentation or range.
29 cl, 5 dwg
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