Code here -> https://github.com/Dirbaio/bip38-cracker
I've put installation instructions in the readme. Tested with Ubuntu 14.10.

Actually there was this other repo that was linked earlier ( https://github.com/cscott/bip38-cracker ) that is quite faster, probably because it uses scrypt-jane. I fixed it up to read the passwords from stdin so I can either crack from a wordlist or a generated list. Stuff's explained in the README.

It took ~20 hours on three n1-highcpu-16 machines on Google Compute. Each one did ~50 passwords per second, 150 total.
It cost around $38 overall.

So yes, cracking 5-char passwords is definitely feasible for relatively cheap. Would be way cheaper if I had used my own hardware.

The password? The cracker sent me the coins and then I destroyed the instances without writing down the password, silly me. Sorry!

That sounds more affordable than the 6-char one
Will give it a try now.


I used this one: https://github.com/notespace/bip38-cracker
It's quite broken though, I had to fix it. I'll try to clean it up and post it to my github soon. Here's a quick summary of what has to be fixed:

- picocoin submodule broken -> point it to https://github.com/jgarzik/picocoin
- Fix build scripts
- (This one drove me nuts) EC point conversion is broken, it should convert the passpoint as compressed and the pubkey as uncompressed, it was doing both compressed. I made a quick ugly hack in picocoin to workaround this.

Trying the second one with all 5-letter english words right now... All lowercase, I hope there's no uppercase letters

EDIT: Found it! The password was 'grAce'. and DAMMIT someone beat me by ~2 hours

EDIT2: And I'm not even going to try the 3rd one. I can try ~20 passwords per second with my current setup, and I've calculated cracking it will take ~30 years...

Thanks for the fun challenge!