METHOD AND APPARATUS FOR A COMPUTABLE, LARGE, VARIABLE AND SECURE SUBSTITUTION BOX

One feature pertains to methods for generating cryptographic values associated with substitution boxes (S-box). The methods includes first obtaining an input value and a first value. One method includes generating an S-box output value by performing an exclusive OR (XOR) operation on the input value...

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Bibliographic Details
Main Author ROSE, GREGORY GORDON
Format Patent
LanguageEnglish
French
German
Published 18.11.2015
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:One feature pertains to methods for generating cryptographic values associated with substitution boxes (S-box). The methods includes first obtaining an input value and a first value. One method includes generating an S-box output value by performing an exclusive OR (XOR) operation on the input value and the first value to generate an intermediate value, and performing a bitwise rotation on the intermediate value by a number of bits equal to the Hamming Weight of the intermediate value. In one aspect, the output of this bitwise rotation is further XOR-ed with a second value. Another method includes generating the S-box output value by performing a bitwise rotation on the input value by a number of bits equal to the Hamming Weight of the input value to generate an intermediate value, and performing an XOR operation on the intermediate value and the first value.
Bibliography:Application Number: EP20130821406