Second reply: I saw that you work in applied cryptography and blockchain technology @ Cryptography Services (NCC Group) so you might be familiar with somewhat Grey Hat russian forum InsidePro; back in the day I saw people there requesting Bitcoin private key recovery for their lost private keys or if they encrypted and/or hashed wallet private keys and couldn't recover plaintext anymore and I can say that amateur crackers could recover private keys pretty efficiently and I can only wonder what professional law enforcement agency can do.
If FBI could crack smartphone encryption/protection from multi trillion dollar company I'm speaking about Apple and that terrorist's Iphone then they do pretty much anything.
