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Kuznyechik

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Kuznyechik

Russian national block cipher (GOST R 34.12-2015, RFC 7801). 128-bit block, 256-bit key, 9-round SPN. Replaces the legacy 1989 GOST cipher. Uses a fixed 256-byte S-box and a linear transform built from 16 GF(2^8) feedback steps.

Securesymmetric

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Imported traces are validated and replayed locally. They never run a cipher operation automatically.

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