FIELD: engineering of data carriers with chip, meant for storage and processing of confidential or secret information, and also to method for protecting confidential data.
SUBSTANCE: data carrier contains at least one memory, wherein working program is stored, containing multiple commands, while execution of each one of such commands is accompanied by appearance of signals, subject to detection from outside the chip. Method for protecting confidential data on aforementioned carrier includes, during processing of data, multiply utilized during encryption of message M by means of modulus operations, working program performs distortion of message M by adding to it at each access of i(=1,...,k) coefficient ri*n, where r - random number, and n - modulus.
EFFECT: increased protection of confidential data from unsanctioned access.
2 cl
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RU2584755C2 |
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RU2485600C2 |
