Here the opinion of one of the Veracrypt authors on this topic: > https://github.com/veracrypt/VeraCrypt/issues/419 https://github.com/veracrypt/VeraCrypt/issu

Here the opinion of one of the Veracrypt authors on this topic: > https://github.com/veracrypt/VeraCrypt/issues/419 https://github.com/veracrypt/VeraCrypt/issues/419 Highlight: "This leads me to think that maybe there is another interesting possibility: the designer of Streebog and Kuznyechic are aware of new type of algebraic attacks affecting modern ciphers and hash functions and they wanted to ensure that these algorithms are immune against this attack without revealing anything about the attacks they are protecting against! This may seem to be far fetched as it would mean that someone has made a breakthrough cryptanalysis but history tells us that this is in the realm of possibilities. For example, people were suspicious of the SBoxes forced by the NSA in the 70s for the DES encryption standard and everybody was saying that they were backdoored. But more that 10 years later, we discovered that actually the NSA was aware of Differential cryptanalysis before it was discovered by academics and they designed the DES SBoxes to resist it. So, if history is repeating it self which is often the case, what we are witnessing here is like the discovery of a cure before the illness is even publicly announced. In which case, we should really worry about existing ciphers like AES and Serpent." --- TLDR: existing ciphers might contain a weakness that was fixed in the design of Streebog and Kuznyechic. EDIT: Why the downvote?