What kind of security is used to encrypt wallets?

Stephen Gornick

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Quote from: DingoRabiit on July 15, 2012, 12:08:33 PM

I've recently lost my wallet.dat password and im locked out of some funds....
What can i do to "brute" it open?

If you think you know the passphrase but just aren't able to get logged in successfully, there have been successful interventions that have found the right passphrase. Here's a recent example

- https://bitcointalksearch.org/topic/encrypted-walletdat-lost-password-any-solutions-85495

John (John K.)

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Away on an extended break

Quote from: DeathAndTaxes on July 15, 2012, 12:19:05 PM

Also the passphrase is converted into the AES key by doing ~10,000 SHA-256 operations. Unless you remember a significant portion of the passphrase (i.e. remember passphrase as "This is my password" and it actually is "This is my p@ssword" it it computationally infeasible to break into your wallet.

Of course if you could brute force your own wallet so could an attacker which would make encrypting it worthless to begin with.

This exactly. Why use encryption if there's a backdoor.

John (John K.)

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Away on an extended break

Quote from: DingoRabiit on July 15, 2012, 12:08:33 PM

I've recently lost my wallet.dat password and im locked out of some funds....
What can i do to "brute" it open?
I have a few programs for such a requirement, But i dont know what to aim at/ what method of 'attack'

Whats the encryption type and how can i brute force it with my gpu(s)?

Are you impersonating another old member?
https://bitcointalksearch.org/user/fiyasko-5705

Saw the first few posts, never mind. Too much alts floating around. Undecided

DeathAndTaxes

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Gerald Davis

Also the passphrase is converted into the AES key by doing ~10,000 SHA-256 operations. This is done to make brute force attacks less effective. Unless you remember a significant portion of the passphrase (i.e. remember passphrase as "This is my password" and it actually is "This is my p@ssword" it it computationally infeasible to break into your wallet.

Of course if you could brute force your own wallet, so could an attacker which would make encrypting it worthless to begin with.

John (John K.)

legendary

Activity: 1288

Merit: 1227

Away on an extended break

Quote from: DingoRabiit on July 15, 2012, 12:08:33 PM

I've recently lost my wallet.dat password and im locked out of some funds....
What can i do to "brute" it open?
I have a few programs for such a requirement, But i dont know what to aim at/ what method of 'attack'

Whats the encryption type and how can i brute force it with my gpu(s)?

https://bitcointalksearch.org/topic/m.708668
AES.
If the password is sufficiently strong enough (I'm talking about no dictionary words and 4 letter passwords), it's practically impossible to break even you get multiple instances of Amazon servers.

DingoRabiit

newbie

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I've recently lost my wallet.dat password and im locked out of some funds....
What can i do to "brute" it open?
I have a few programs for such a requirement, But i dont know what to aim at/ what method of 'attack'

Whats the encryption type and how can i brute force it with my gpu(s)?

Topic: What kind of security is used to encrypt wallets? (Read 1002 times)