REMAPPING CONSTANT POINTS IN A WHITE-BOX IMPLEMENTATION

A method of producing a cryptographic implementation of a cryptographic operation mapping an input message to an output message, wherein the cryptographic operation includes at least one round including a non-linear mapping function configured to map input data to output data, comprising: producing...

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Bibliographic Details
Main Authors Michiels, Wil, Hoogerbrugge, Jan
Format Patent
LanguageEnglish
French
German
Published 17.05.2017
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A method of producing a cryptographic implementation of a cryptographic operation mapping an input message to an output message, wherein the cryptographic operation includes at least one round including a non-linear mapping function configured to map input data to output data, comprising: producing a cryptographic implementation of the cryptographic operation wherein the cryptographic implementation is configured to: determine that the input data has a diversification number less than a diversification level threshold number; remap the input data to a remapped input data, wherein the remapped input data corresponds to an input data having a diversification number greater than or equal to the diversification threshold value, and input the remapped input data into the non-linear mapping function to obtain output data.
Bibliography:Application Number: EP20150177319