Schneier - Cryptanalyzing a Pair of Russian Encryption Algorithms

A pair of Russia-designed cryptographic algorithms -- the Kuznyechik block cipher and the Streebog hash function -- have the same flawed S-box that is almost certainly an intentional backdoor. It's just not the kind of mistake you make by accident, not in 2014.



from Schneier on Security https://www.schneier.com/blog/archives/2019/05/cryptanalyzing_.html

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