Re: Missing 10 Characters in WIF Private Key - Can I recover them?
If there is an outgoing transaction, then with the un/compressed public key and kangaroo or pollard, also possible.
Sadly this was an offline wallet, so it only ever had incoming transaction. It has never sent out.1 year ago, user PawGo calculated exactly your case (10 missing WIF characters) but with the public key in less than 11 minutes.
Quote
Let's take WIF 5HrdZxkxnVst8Q_____keiLe1k4AmSDaAhqQVUYVxVSBkf5VfUu
Now, we may find the first WIF to be tested, it will be 5HrdZxkxnVst8Q11111keiLe1k4AmSDaAhqQVUYVxVSBkf5VfUu.
Now, we may find the first WIF to be tested, it will be 5HrdZxkxnVst8Q11111keiLe1k4AmSDaAhqQVUYVxVSBkf5VfUu.
They started with less missing characters but then ...
Not bad, no? 
10 missing WIF characters - Less than 11 minutes on old CPU. GPU performance - to be seen.
That's fantastic. I'll have to go back to check Pollard's kangaroo algorithm again. 10 missing WIF characters - Less than 11 minutes on old CPU. GPU performance - to be seen.Thread: Using Kangaroo for WIF solving http://bitcointalk.org/index.php?topic=5315607.0
Edit: PawGo posted
Hi,
1) you may check my program WifSolver to see if it helps.
https://github.com/PawelGorny/WifSolver
2) in your case I think it is possible to convert program into task for BitCrack. Using Gpu solution will be find much faster. Let me know if you need help with configuring bitcrack - how to configure range start/stop, stride etc
3) BUT! If you say that you know publickey, we may use even faster solution, Kangaroo. I have prepared a special version of it to work with custom stride, somewhere on the forum I post explanation how it works. If it works, for 10 missing characters result will be done in VERY reasonable time.
Check the post:
https://bitcointalk.org/index.php?topic=5315607.msg56298967#msg56298967
1) you may check my program WifSolver to see if it helps.
https://github.com/PawelGorny/WifSolver
2) in your case I think it is possible to convert program into task for BitCrack. Using Gpu solution will be find much faster. Let me know if you need help with configuring bitcrack - how to configure range start/stop, stride etc
3) BUT! If you say that you know publickey, we may use even faster solution, Kangaroo. I have prepared a special version of it to work with custom stride, somewhere on the forum I post explanation how it works. If it works, for 10 missing characters result will be done in VERY reasonable time.
Check the post:
https://bitcointalk.org/index.php?topic=5315607.msg56298967#msg56298967
What kind of hardware did he have to solve 10 characters in 11 minutes! Thats awesome and is exactly what I need. going to look into this as well now!