Wallet Encryption Password Lost - 10 BTC! - page 2.

casperround

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Quote from: CIYAM on December 06, 2014, 11:41:05 AM

Quote from: casperround on December 06, 2014, 11:38:15 AM

Well this seams like a dead loss.

Are you seriously saying you think that your wallet is encrypted with a 30-40 character password of which you can't remember any of it?

(because if that is what you are saying then I would be seriously doubting that it actually is your wallet at all)

Reason it's my wallet, I use a 30-40 character password for most of my bitcoin accounts, with upper case, lower case, and numbers to stop people from taking from me. As I have already have an incident where someone stole 1.2Btc from my Blockchain wallet!

guitarplinker

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Quote from: CIYAM on December 06, 2014, 11:41:05 AM

Quote from: casperround on December 06, 2014, 11:38:15 AM

Well this seams like a dead loss.

Are you seriously saying you think that your wallet is encrypted with a 30-40 character password of which you can't remember any of it?

(because if that is what you are saying then I would be seriously doubting that it actually is your wallet at all)

He could have generated a password in KeePass or similar, and then forget to save KeePass once he had the password generated, losing access to the wallet. I use KeePass and I know a couple of times I've almost shut off my machine without saving my new KeePass entries.

CIYAM

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Ian Knowles - CIYAM Lead Developer

Quote from: casperround on December 06, 2014, 11:38:15 AM

Well this seams like a dead loss.

Are you seriously saying you think that your wallet is encrypted with a 30-40 character password of which you can't remember any of it?

(because if that is what you are saying then I would be seriously doubting that it actually is your wallet at all)

casperround

newbie

Activity: 38

Merit: 0

Well this seams like a dead loss.
Has anyone tried the change passphrase option on Pywallet?

CryptKeeper

legendary

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Quote from: redsn0w on December 06, 2014, 10:59:14 AM

Quote from: guitarplinker on December 06, 2014, 10:57:32 AM

Quote from: casperround on December 06, 2014, 10:53:10 AM

I've messaged Dave via the service and said I would happily pay him, no reply yet.
I had a thought, if I export the dat as a .txt, then change the encrypted private key to a new one that I know, then export to a .dat
Would that work? Like overwriting the original encrypted private key?

That wouldn't work. If you changed the encrypted private key to a new private key with a new password, you would lose access to your old encrypted private key holding the 10BTC worth.

One thing you can do though if you can't figure out the password is keep the wallet.dat file safely backed up - I'm sure that in 10 or 15 years it'll be much easier to crack a 30-40 character password than it is now. That'll definitely be a long time from now, but it might be worth it.

Yeah , I think this is the unique solution for the moment. With the technology of the future maybe you can easily crack the password (but I'm not sure).

The bitcoin-qt uses key stretching for the encryption of the wallet.dat. Somewhere in the wallet.dat is an entry about the number of rounds that are needed for decryption of the private keys. Depending of the speed of the pc which encrypted the wallet.dat it can be 100000 or more rounds of AES256. It's done in this way so that even passwords of short length are very hard to break by brute force!

TL;DR
If you have one or two typos in your password, it could be possible to brute force it. But 30-40 characters are not crackable for a very long time. Sad

redsn0w

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#Free market

Quote from: guitarplinker on December 06, 2014, 10:57:32 AM

Quote from: casperround on December 06, 2014, 10:53:10 AM

I've messaged Dave via the service and said I would happily pay him, no reply yet.
I had a thought, if I export the dat as a .txt, then change the encrypted private key to a new one that I know, then export to a .dat
Would that work? Like overwriting the original encrypted private key?

That wouldn't work. If you changed the encrypted private key to a new private key with a new password, you would lose access to your old encrypted private key holding the 10BTC worth.

One thing you can do though if you can't figure out the password is keep the wallet.dat file safely backed up - I'm sure that in 10 or 15 years it'll be much easier to crack a 30-40 character password than it is now. That'll definitely be a long time from now, but it might be worth it.

Yeah , I think this is the unique solution for the moment. With the technology of the future maybe you can easily crack the password (but I'm not sure).

guitarplinker

legendary

Activity: 1694

Merit: 1024

Quote from: casperround on December 06, 2014, 10:53:10 AM

I've messaged Dave via the service and said I would happily pay him, no reply yet.
I had a thought, if I export the dat as a .txt, then change the encrypted private key to a new one that I know, then export to a .dat
Would that work? Like overwriting the original encrypted private key?

That wouldn't work. If you changed the encrypted private key to a new private key with a new password, you would lose access to your old encrypted private key holding the 10BTC worth.

One thing you can do though if you can't figure out the password is keep the wallet.dat file safely backed up for a long time - I'm sure that in 10 or 15 years it'll be much easier to crack a 30-40 character password than it is now with faster computing, plus there's always a chance that the encryption algorithm for Bitcoin-Qt will be cracked. That'll definitely be a long time from now, but it might be worth it.

casperround

newbie

Activity: 38

Merit: 0

I've messaged Dave via the service and said I would happily pay him, no reply yet.
I had a thought, if I export the dat as a .txt, then change the encrypted private key to a new one that I know, then export to a .dat
Would that work? Like overwriting the original encrypted private key?

carlosiness

hero member

Activity: 672

Merit: 500

brutaforce method could take many many years, depends on the password complexity.
i don't know any programs, i think it should be written special for your purpose...

guitarplinker

legendary

Activity: 1694

Merit: 1024

Quote from: casperround on December 06, 2014, 10:31:40 AM

Does anyone know any bruteforce programs for the wallet.dat, that can use a GPU?

I believe Wallet Recovery Services uses a GPU bruteforcing program. You could try asking to see if Dave (the owner) would be willing to send you the program. I have a suspicion he wouldn't want to send it over though, because it's custom coded for him.

casperround

newbie

Activity: 38

Merit: 0

Does anyone know any bruteforce programs for the wallet.dat, that can use a GPU?

Sarahiko

hero member

Activity: 772

Merit: 500

It can be brute force if you know some of the key pass or some miss type letters, but if you don`t remember any of it then say goodbye to your coins. Good Luck, just be careful when dealing with someone.

alexrossi

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Join the world-leading crypto sportsbook NOW!

Quote from: casperround on December 06, 2014, 06:52:40 AM

Yep thats the reason I do not want to lose that amount.

The password is around 30-40 characters with uppercase/lowercase/numbers

Sorry, this wallet is NSA-proof for at least the next 50 years...

SpreadBit

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SatoshiBet.com ✯ Bitcoin Casino Games

Quote from: casperround on December 06, 2014, 08:14:14 AM

Anyone who would like to help, and can manage to unlock it will be given 3BTC
skype is: casper.round

Many thanks!

Sorry mate, I got my fucking skype crashed.
Fixing it. Will be in contact with you within 15 minutes.

casperround

newbie

Activity: 38

Merit: 0

Anyone who would like to help, and can manage to unlock it will be given 3BTC
skype is: casper.round

Many thanks!

yenzae0215

full member

Activity: 140

Merit: 100

30-40 characters password gives you a big problem.. if you're at home better to use about 10 characters next time Undecided

sorry for your lost hope you can get it back

antonpans

full member

Activity: 241

Merit: 101

30-40 letters...i would be borred to use such a big password to be honest. I think all advices been posted already. Just watchout who you work with. Im sure the chances to recover it are below 0.01% but good luck

SpreadBit

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Activity: 154

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SatoshiBet.com ✯ Bitcoin Casino Games

Quote from: casperround on December 06, 2014, 06:52:40 AM

Yep thats the reason I do not want to lose that amount.

The password is around 30-40 characters with uppercase/lowercase/numbers

Got skype? I can help you recover it.
PM me your skype.

casperround

newbie

Activity: 38

Merit: 0

Yep thats the reason I do not want to lose that amount.

The password is around 30-40 characters with uppercase/lowercase/numbers

alexrossi

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Merit: 1742

Join the world-leading crypto sportsbook NOW!

Approximately, how many characters is long the password?

Topic: Wallet Encryption Password Lost - 10 BTC! - page 2. (Read 3060 times)