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We study the possibility of GOST block cipher modification in such way, that it would resist Isobe and Dinur-Dunkelman-Shamir attacks, and, at the same time, would be still lightweight-friendly. 1 Inroduction GOST 28147-89 block cipher [1] is known for more than 20 years and with proper s-boxes believed to be secure. In 2011 two attacks were published by(More)
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