Private Key Restorer | Bitcointalksearch.org

ewaspiro

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Activity: 74

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Quote from: salman786786 on May 06, 2020, 04:54:39 PM

Quote from: Patrick349 on September 22, 2016, 02:35:32 PM

I need a private key restorer.

guys i have Etherium private key was saved in notepad accidently my kids press some alphabet and first 20 digits missing and i have saved it without notic can anyone please help me to recover if its possible

You could try these guys https://keychainx.io

MixMAx123

full member

Activity: 161

Merit: 168

It should run with any Java version. https://java.com/de/download/

It is then started with a double click on the .jar file. https://github.com/MrMaxweII/repairPrivKey/releases/download/V1.3.1/repairPrivKey.jar

hijack86

newbie

Activity: 7

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hi!

How to run this tool ?
What a version of java need install?

j2002ba2

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Quote from: salman786786 on May 06, 2020, 04:54:39 PM

guys i have Etherium private key was saved in notepad accidently my kids press some alphabet and first 20 digits missing and i have saved it without notic can anyone please help me to recover if its possible

If your key was reused then it's possible to recover it. Then the time complexity is only 2⁴⁰, which is doable in 15 minutes on a V100 GPU.

Reused key means you sent coins from it, and know the public key.
Or if you signed anything and have the signature.

MixMAx123

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Activity: 161

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I wrote a Java tool that can do that, but 20 characters are impossible in her lifetime.

https://github.com/MrMaxweII/repairPrivKey

Csmiami

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I'm sometimes known as "miniadmin"

Quote from: salman786786 on May 06, 2020, 04:54:39 PM

---

Was your private key saved in a file before your kid fucked it up? If that's the case, you may be able to restore an earlier version of said file; and with some luck, it will contain the whole privkey.

bob123

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Activity: 1624

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Quote from: salman786786 on May 06, 2020, 04:54:39 PM

guys i have Etherium private key was saved in notepad accidently my kids press some alphabet and first 20 digits missing and i have saved it without notic can anyone please help me to recover if its possible

Unfortunately not.
You would have been able to restore a few chars, but definitely not 20.

By the way, if you don't have an offline backup (not stored on your computer), you don't have a backup at all.
Any incident affecting your computer (electrical short, ransomware, .. ) could have lead to a loss of the private key.

Storing a backup on the same device as the wallet is not a backup at all.

HCP

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Quote from: salman786786 on May 06, 2020, 04:54:39 PM

guys i have Etherium private key was saved in notepad accidently my kids press some alphabet and first 20 digits missing

20 characters missing!!?! Shocked

Your chances of being able to recover that in a 'timely' manner are pretty much zero... that's nearly 1/3 of the 64 hex characters making up a private key... and something ludicrous like 16^20 permutations... 1208925819614629174706176 to be precise. Shocked

salman786786

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Activity: 1

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Quote from: Patrick349 on September 22, 2016, 02:35:32 PM

I need a private key restorer.

guys i have Etherium private key was saved in notepad accidently my kids press some alphabet and first 20 digits missing and i have saved it without notic can anyone please help me to recover if its possible

elbandi

hero member

Activity: 525

Merit: 529

Quote from: dex1 on September 24, 2016, 08:28:50 AM

Great code, works fine alas only with uncompressed private keys.

Would it be possible to write similar program to work with compressed ones ?

Sure, here is the universal version: http://pastebin.com/gPzBp6u3

it recognize the compression type from the first char.

if the first char is a missing char, you have to set the compression type by manual (compressed = 0; or compressed = 1;)

tips are welcome: 1JsU1mfK3qxC37JoFiVhvi3KoA7ceUaMrZ Roll Eyes

dex1

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Activity: 141

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Quote from: elbandi on September 22, 2016, 06:27:42 PM

Compile this code: http://pastebin.com/S8WARrRn

This code is for address with 5 unknow "-" chars!!

First set your address to 58. line, and compile the code (you need openssl dev installed, apt-get install libssl-dev):

Code:

gcc -o recovery recovery.c -I /usr/include -Wall -lssl -lcrypto -O2

run it ( ./recovery ), and stop with ctrl+c, you got 5 "index: XX" lines.

Modify the "define C_X_INDEX" lines in the code (line 49-53). Compile again.

Run again and wait, get a coffee, or 10. Cheesy

Great code, works fine alas only with uncompressed private keys.

Would it be possible to write similar program to work with compressed ones ?

LFC_Bitcoin

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Quote from: DannyHamilton on September 22, 2016, 05:48:02 PM

I could probably throw together a C program that would do this for you. Do you have the ability to compile and run a C program?

If not, I might also be able to put together something in node.js

Top guy DannyHamilton is, one of the best here. OP you are lucky to have found a poster who is willing to do this for you.

Anomgst all the bull shit & scamming that goes on here it's good to see there are some good people here.

LoyceV

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Quote from: elbandi on September 23, 2016, 04:30:08 AM

"Test 1A" means: testing this privkeys: 5HpHag165TZAG1PH3CSu63k8Dbp*D8s5ip*nEB3kEsreAnc*uDf
there are 58*58 (=3364) so groups, with your cpu (~2 sec/testgroup) you get the result about 2 hours.

Thanks. I edited my post the same time you posted this.
You say 58 where I assumed 62. I didn't realize until now the private key excludes the same characters that are excluded from the address.

Quote from: DannyHamilton on September 23, 2016, 08:16:12 AM

In the meantime if you find another copy of your private key, or manage to remember what the values were, just let me know so I don't waste time on it.

elbandi already posted a working program.

DannyHamilton

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Quote from: ?? on ??

Yes, normaly I can run a C programm.

It would be nice if you can throw a programm togehter. Wink

No problem.

I'll put something together this weekend and test it for a few days next week to see how good I can get the performance.

In the meantime if you find another copy of your private key, or manage to remember what the values were, just let me know so I don't waste time on it.

elbandi

hero member

Activity: 525

Merit: 529

Quote from: LoyceV on September 23, 2016, 03:55:23 AM

What does this output mean? When it says Test: 1A, what is it doing? Is it searching for the all possibilities on the 3 dots that start with A1, so it will stop at Tz?
5HpHag-65TZ-G1PH3CSu63k8Dbp-D8s5ip-nEB3kEsreAnc-uDf
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf

"Test 1A" means: testing this privkeys: 5HpHag165TZAG1PH3CSu63k8Dbp*D8s5ip*nEB3kEsreAnc*uDf
there are 58*58 (=3364) so groups, with your cpu (~2 sec/testgroup) you get the result about 2 hours.

Quote from: LoyceV on September 23, 2016, 03:55:23 AM

What doIf I'm right on this, it's a bit slower than vanity gen, doing 62^3=238328 keys in 2 seconds. Vanitygen does 3 times more on 2 cores.

i dont know vanitygen, how do you run it to test this keys?

LoyceV

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Quote from: elbandi on September 22, 2016, 06:27:42 PM

Compile this code: http://pastebin.com/S8WARrRn

This code is for address with 5 unknow "-" chars!!

First set your address to 58. line, and compile the code (you need openssl dev installed, apt-get install libssl-dev):

Code:

gcc -o recovery recovery.c -I /usr/include -Wall -lssl -lcrypto -O2

run it ( ./recovery ), and stop with ctrl+c, you got 5 "index: XX" lines.

Modify the "define C_X_INDEX" lines in the code (line 49-53). Compile again.

Run again and wait, get a coffee, or 10. Cheesy

I've got it running, to test

Code:

Test: 11...1.984325s
Test: 12...1.990294s
Test: 13...1.985650s
Test: 14...1.966374s
Test: 15...1.970396s
Test: 16...1.968263s
Test: 17...1.960968s
Test: 18...2.025619s
Test: 19...2.121881s
Test: 1A...2.021763s
Test: 1B...1.986647s
Test: 1C...2.025444s
Test: 1D...1.988550s
Test: 1E...2.019848s
Test: 1F...2.009220s
Test: 1G...1.994616s
Test: 1H...1.994534s
Test: 1J...1.989563s

When it says Test: 1A, it's searching for the all possibilities on the 3 dots that start with A1, until it stops at Tz.
5HpHag-65TZ-G1PH3CSu63k8Dbp-D8s5ip-nEB3kEsreAnc-uDf
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf
That makes it a bit slower than vanity gen, doing 62^3=238328 keys in 2 seconds. Vanitygen does 3 times more, but uses both 2 cores.

Edit:
Test: Tx...1.986084s
Test: Ty...1.994141s
Test: Tz...
FOUND: 5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf

Thanks! I will keep this program, I may need it someday.

elbandi

hero member

Activity: 525

Merit: 529

Compile this code: http://pastebin.com/S8WARrRn

This code is for address with 5 unknow "-" chars!!

First set your address to 58. line, and compile the code (you need openssl dev installed, apt-get install libssl-dev):

Code:

gcc -o recovery recovery.c -I /usr/include -Wall -lssl -lcrypto -O2

run it ( ./recovery ), and stop with ctrl+c, you got 5 "index: XX" lines.

Modify the "define C_X_INDEX" lines in the code (line 49-53). Compile again.

Run again and wait, get a coffee, or 10. Cheesy

DannyHamilton

legendary

Activity: 3360

Merit: 4570

I could probably throw together a C program that would do this for you. Do you have the ability to compile and run a C program?

If not, I might also be able to put together something in node.js

ghost15

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Quote from: LoyceV on September 22, 2016, 04:34:20 PM

Quote from: ghost15 on September 22, 2016, 03:35:31 PM

you can do it at https://www.bitaddress.org/
but it will take you a long time to exploit all the feasible solution.
about 570000 possibility withe these five missing letters Cry

good luck

So how did you do it in 20 minutes? It would be a nice trick to have if I ever need it.

I have not done it in 20 minutes but 2 seconds Grin

.
because all the private key are numbers from 1 to 115792089237316195423570985008687907853269984665640564039457584007913129639935 (this privat key: ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff or 5Km2kuu7vtFDPpxywn4u3NLu8iSdrqhxWT8tUKjeEXs2f9yxoWz as WIF), and the numbers of this key is just 1

Quote

Private Key Hexadecimal Format (64 characters [0-9A-F]): 0000000000000000000000000000000000000000000000000000000000000001

LoyceV

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Quote from: ghost15 on September 22, 2016, 03:35:31 PM

you can do it at https://www.bitaddress.org/
but it will take you a long time to exploit all the feasible solution.
about 570000 possibility withe these five missing letters Cry

good luck

So how did you do it in 20 minutes? It would be a nice trick to have if I ever need it.

Topic: Private Key Restorer (Read 3545 times)