FIELD: protection of information.
SUBSTANCE: method includes swapping low-meaning bits of digital signal of container by secret information bits, while for recording a bit of secret information a sub-set of counts of digital signal is taken, change of value of which for one unit leads to setting of a bit of secret information in value of discontinuous function of distribution of values of container digital signal counts, while from this sub-set of counts for recording of a secret information bit the count is picked, modulus of difference of which between own value and average value of adjacent counts is maximal.
EFFECT: implemented distribution of distortions inserted into records on maximally non-homogenous portions of container to make analysis more complicated.
7 dwg
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