Remapping constant points in a white-box implementation

A non-transitory machine-readable storage medium encoded with instructions for execution by a keyed cryptographic operation by a cryptographic system mapping an input message to an output message, wherein the cryptographic operation includes at least one round including a non-linear mapping function...

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Bibliographic Details
Main Authors Michiels Wil, Hoogerbrugge Jan
Format Patent
LanguageEnglish
Published 14.02.2017
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A non-transitory machine-readable storage medium encoded with instructions for execution by a keyed cryptographic operation by a cryptographic system 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, including: instructions for determining that the input data has a diversification number less than a diversification level threshold number; instructions for remapping 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 instructions for inputting the remapped input data into the non-linear mapping function to obtain output data.
Bibliography:Application Number: US201414484925