A. V. Merkusheva
Saint-Petersburg
A method is investigated for
hidden transmission of informational signals (speech) by means of scrambling
on the basis of double transformation: wavelet-mapping modification with
H-equivalent matrices. Two algorithm structures for scrambling are given
and analyzed. They are specialized for analog and digital channels. The
number of keys is determined. The residual information in a scrambled signal
is estimated on the basis of two methods (correlation and information-theoretic).