https://github.com/mleku/x-realy/releases/tag/vainstr-v1.0.0 if you are running any recent linux this binary should be the ticket. you can see here an example of it generating a key: i used the btcd btcec secp256k1 library before, and it took like 3 days... now as you can see, a key with merely 5 letters potentially not even a minute on hardware like mine (which you can see in the image also what it is)