Bitcoin Forum

Hello everybody ,  my name is Amir and i need your help !!

I have a private key in hexadecimal format with 7 missing characters out of 64;   i know the location of the missing characters /   -   i know also the corresponding bitcoin adress yet there are no output transactions so i don't know the public key ... just the adress

After i searched the internet for a solution and found some tools for situations like mine / none of them seems to fitt my exact sittuation: some of the tools cand recover only the end of the private key , others works for diferent private key formats   !


 can please somebody make a tool for me so i can recover my private key ? i would send a tip to that person as soon as i recover my funds/     i have to mention also that i have no programming skills / i don't know to read or apply a code so please make the tool as user friendly as possible and post some "noob" instructions of how to use it .   the tool must work in offline so i can trust it 

with respect  / i am waiting for your replays

Hi so basically if you know exactly their positions, there are 16 ^ 7 = 268435456 modes for it. It can be done via Python. Although you must have powerful CPU because the large number of attempts. Please PM me if you like.

Edit: If you want to send me a PM, please be sure that you checked the "Allow newbies to send you PMs." option in your profile page, Personal Message Options section. Thanks.

There is easy to use software for that:

https://bitcointalk.org/index.php?topic=5214021.0

Download and follow the instructions.
So long as you can install the software you can do it.

It might take a while depending on the speed of your setup but it does work well and you can ask in that thread for help.

-Dave

Not sure but seems that Coding Enthusiast's tool works only on base58 keys whereas OP's key is in HEX format.

@OP, try contacting Coding Enthusiast (https://bitcointalk.org/index.php?action=profile;u=879277). Maybe he will write a custum script for you.
Be careful when dealing with newbies and do never send them any sensitive data. No offense @Man86C, but better be safe than sorry.

Yes, He can't.
It needs to be complete because there's a checksum which is the double SHA256 hash of version byte & the (HEX) private key.
And that checksum is included when converting the "combined results" into base58.

Try this  https://gobittest.appspot.com/Address
You can run offline.
Hi how much bitcoin do you have?  I hope this can help what you can do is type you hex in the first box Private Ecdsa key. Then add seven characters you think is the key. Click send and look in bottom box see if your address is there, if it is you have right key. Let me know if you get it.

It will be slow but you can keep trying different stuff. Dont give up keep typing different numbers .  If you find it please reward me I hope you have 100 btc. You can send btc here  13ogmvro1bzG7i1rqYCxs67KzK7k1fEhqQ

he has to check >268 million variations, that is not something you can call "slow" when your suggestion is to check by hand! the term "impossible" is more appropriate here.
additionally using a website is not such a good idea as you don't know what the source code of it is and what happens to the keys you enter in that site not to mention being online could potentially mean having a compromised system.

wow :o ! hey mates , thank you all for your replays :D

indeed there are 16 power of 7 possible combination in my scenario / it can be done  ( 7 missing char out of 64 hexadecimals)

By now the best solution is to follow that topic you recomanded me  " https://bitcointalk.org/index.php?topic=5214021.0"  and check for updates /    right now it will not work for me :(     the software must be updated to accept private keys in hexadecimal format .  I will also  send a message to Coding Enthusiast and request his help  ;    i'll keep this post updated untill i am done with my adress

If you need find Private key using same templates:

xxxxxxxxxxxxxxxxxxxxxxxx???????xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
or
xxxxxxxxxxxxxxxxxxxxxxxxx???????xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
or
xxxxxxxxxxxxxxxxxxxxxxxxx?xxxx??xxxxx???xxxxx?xxxxxxxxxxxxxxxxxx

and if you know  Adress or Compressed Adress, then i can give you my Script (php language), instruction. its  easy.  :)

All actions you will do self on your PC.

If its intersting for you, we can begin dialog.

Could you also share the speed you've reached in keys/second? I'm at a very low speed of ~1200 although there is no restriction on number of missing chars or position of them.

You would need to modify the finder to use gpu, cpu will be too slow.

~ 1500 keys/sec   (cpu Intel Pentium b960)  :).  Your true, it is very low.   But privatkey (7 characters) will be found at 1.5 -3 days.  You can wait for some time if the result is worthy to wait  8)



 

Thanks for sharing the rate. Your speed seems a lot higher than mine considering your much weaker CPU compared to mine (core i3-6100).
It would be great if you could share the code publicly though.