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In this paper, we implement the Russian standard block cipher Grasshopper onField-Programmable Gate Array (FPGA). We also study the Correlation PowerAnalysis attack, which is a special type of side-channel attack proposed byBrier et al. To face this kind of attack, we propose a solution of softwarecountermeasure, and we present the associated implementation of the Grasshopperalgorithm. These two implementations are then compared to an AES-256 one.Finally, through the implementation of a CPA attack on an FPGA developmentboard, we show that typical attack models that work on AES fail on Grasshopperimplementations.

The resistance of an FPGA implementation of Grasshopper block cipher to CPA attacks