Method for performing cryptographic operations on data in a processing device, corresponding processing device and computer program product

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United States of America Patent

PATENT NO 11502836
APP PUB NO 20210226789A1
SERIAL NO

17149623

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Abstract

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A scalar multiplication operation includes an iterative procedure performing a set of operations at each iteration on a bit or on a group of consecutive bits of a secret key. The multiplication operation includes multiplying values of projective format coordinates by a random value. The random value is a product of a random number generated over a range having as end value a first value, with a second value, which is larger than said first value. The first value is a power of two of a word size multiplied by a multiplier value, minus one. The second value is equal to a power of two of a number of bits of the coordinates divided by the first value. The multiplier value is an integer greater than or equal to one and smaller than a ratio of said number of bits to the word size.

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Patent Owner(s)

  • SMI STMICROELECTRONICS S.R.L

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bertoni, Guido Marco Bernareggio, IT 22 248
Susella, Ruggero Milan, IT 9 45

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