Intel Corporation

Joseph Friel

Santosh Ghosh

Avinash Laxmisha Varna

Manoj R Sastry

Carlos Alfonso Tokunaga

Andrew H Reinders

Debayan Das

Varna Avinash

Embodiments are directed to countermeasures for side-channel attacks on protected sign and key exchange operations. An embodiment of storage mediums includes instructions for commencing a process including an elliptic curve scalar multiplication (ESM) operation including application of a secret scalar value; splitting the secret scalar value into two random scalar values; counting a number of leading '0' bits in the scalar value and skipping the number of leading '0' bits in processing; performing an ESM iteration for each bit of the secret scalar value beginning with a most significant &#x2018;1&#x2019; bit of the scalar value including a Point Addition operation and a Point Double operation for each bit on randomized points; performing ESM operation dummy iterations equal to the number of leading &#x2018;0&#x2019; bits; and returning an output result for the ESM operation.

Countermeasures for side-channel attacks on protected sign and key exchange operations

Embodiments are directed to countermeasures against hardware side-channel attacks on cryptographic operations. An embodiment of an apparatus includes multiple crypto cores; and a current source including multiple current source blocks, the current source blocks including a respective current source block associated with each of the crypto cores, and wherein the current sources blocks are switchable to switch on a current source block associated with each active core of the multiple crypto cores and to switch off a current source associated with each inactive core of the multiple cryptographic cores.

Countermeasures against hardware side-channel attacks on cryptographic operations

Growing community of inventors

Santa Clara, CA, United States of America

Joseph Friel