FIELD: information security.
SUBSTANCE: invention relates to countermeasures against attacks via third-party channels. Method of countermeasures against attacks via third-party channels, wherein method includes executing of block encryption algorithm to mask intermediate variables, wherein block encryption algorithm comprises one or more non-linear functions, and at least one of non-linear functions is realised using mapping function in place.
EFFECT: technical result is effective protection against attacks via third-party channels due to usage of mapping function in place.
9 cl, 4 dwg
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