OP how did this happen? I don't know how you only have part of your privatekey.
So if they can figure out the private key of him. Means that, none of our private key is safe here?
Sorry for this conclusion, but it makes me wonder. Imagine if i want to solve someone private's key but pretend that it's my address?
Exactly, if it was so easy then we should all be very worried. That is an interesting website, I would love to see how it is done. I think you need to still have a lot of details about the wallet. I think having 8 missing letters is not so bad and if anyone can do it they can. I still don't see how it is possible but he at least has a large part of his privatekey.
This is as good as lossing all characters in your private key. There are more than 1billion combination and possible guess which is highly impossible. The best you can do now is to find the private key
I do not think that you will succeed. As a rule, the system works in such a way that it is impossible to generate the last 8 letters. you could pick up 2 or 3 but not

Are you guys being paid for the bounty you are in? Where is the bounty thread? Thank you.