Protecting polynomial hash functions from external monitoring attacks

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12261935
APP PUB NO 20210152331A1
SERIAL NO

17105247

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Abstract

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Systems and methods for protecting from external monitoring attacks cryptographic data processing operations involving computation of a universal polynomial hash function, such as GHASH function. An example method may comprise: receiving an input data block, an iteration result value, and a mask value; performing a non-linear operation to produce a masked result value, wherein a first operand of the non-linear operation is represented by a combination of the iteration result value and the input data block, and the second operand of the non-linear operation is represented by a secret hash value, and wherein one of the first operand or the second operand is masked using a mask value; determining, based on the mask value, a mask correction value; and producing a new iteration result value by applying the mask correction value to the masked result value.

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Patent Owner(s)

Patent OwnerAddress
CRYPTOGRAPHY RESEARCH INCSUNNYVALE CA 94089

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
de, Almeida Guilherme Ozari Nootdorp, NL 7 68
De, Mulder Elke Kirkland, US 15 32
Trichina, Elena Aix-en-Provence, FR 19 722

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