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13 votes

How to change the password to an account?

Simply use geth as indicated in the github wiki: Account update $ geth account update a94f5374fce5edbc8e2a8697c15331677e6ebf0b Unlocking account a94f5374fce5edbc8e2a8697c15331677e6ebf0b | Attempt ...
Nicolas Massart's user avatar
11 votes

What is the difference between a private key, password, brain wallet, recovery passphrase, and wallet?

(I've left this as an answer, rather than a wiki, to encourage multiple answers since there may be other explanations that resonate better with people) For brevity, this answer assumes that the ...
lungj's user avatar
  • 6,680
10 votes

How can I recover or reset a lost wallet password?

pyethrecover is well documented, This is a tool for those of you who've somehow lost your Ethereum wallet password. pyethrecover is a library for brute forcing your wallet with a list of passwords ...
niksmac's user avatar
  • 9,683
10 votes

Blockchain password manager

The problem of storing private data on the blockchain is that everyone can see it. If you encrypt the info into the blockchain, by the pseudo-random property of the blockchain you can't ensure that ...
CPereez19's user avatar
  • 2,835
8 votes
Accepted

Is it safe to create a password in a smart contract?

It's absolutely not safe! You could create and save a hash of the password off-chain and save it in the smart contract. But this is no good anyways because of the Frontrunning attack. When a user ...
Jeremy Then's user avatar
  • 4,619
5 votes
Accepted

Lockout time for Ethereum accounts

From the documentation: The unencrypted key will be held in memory until the unlock duration expires. If the unlock duration defaults to 300 seconds. An explicit duration of zero seconds ...
Richard Horrocks's user avatar
5 votes
Accepted

Is it possible to regenerate the private key file?

You cannot recreate the private key file. The password is used to decrypt the key file, and then an address is generated from the private key in a non-reversible way. The private key is really the ...
Tjaden Hess's user avatar
  • 37.2k
5 votes

How can I recover or reset a lost wallet password?

I would like to share my experience. I had forgotten my passphrase for my presale wallet, and was spending months to develop multiple passphrases to unlock it to no avail. I checked a couple of ...
Clarence's user avatar
5 votes

Recovering private key from keystore file

Private key recovery instructions: Download and install NodeJS Create a new folder, and: Copy your key-store file into this folder Create a new file called run.js in this folder Open a command-line ...
goodvibration's user avatar
4 votes

password no longer working (but others do)

One general thing to try, which isn't specifically related to Ethereum, but added here in case it helps anyone in future from going into meltdown mode... If your password contains non-standard ...
Richard Horrocks's user avatar
4 votes
Accepted

Blockchain password manager

You don't need a blockchain in order for it to be open source (and you shouldn't use blockchains to store private data, as explained by CPereez19). Instead, why not consider a local password manager ...
Teo Klestrup Röijezon's user avatar
3 votes

What is the bkp component in a presale JSON file?

No. Your bkp is not the SHA3 of your password. It's really quite simple. In the beginning, god said genwallet and... genwallet says: genwallet(opts['seed'],pw,email) You say "here's my email ...
tayvano's user avatar
  • 16k
3 votes

How to apply pyethrecover.py on v3 .json/transfor v3 .json to .v1

I had the same problem. I had created a wallet using geth and somehow I wrote down the wrong password. I used the simple python code below to solve the issue. I know it's not pretty, but I just needed ...
rhkarls's user avatar
  • 141
3 votes
Accepted

Can you safely change your Ethereum password without creating a new Account?

The password is used to encrypt your private key. When you change the password, the client decrypts the private key using the old password and then re-encrypts it using the new password, overwriting ...
Tjaden Hess's user avatar
  • 37.2k
3 votes
Accepted

Isn't the ethereum wallet keystore encrypted?

You only need to enter your passphrase when you want to transfer some ethers from your accounts / addresses. Your encrypted keys will be stored in the following directories with one individual file ...
BokkyPooBah's user avatar
  • 40.3k
3 votes
Accepted

How do I unlock the `geth --dev` developer account?

The account has a blank password. $ geth --dev console ... > personal.unlockAccount(eth.accounts[0], ""); true You can unlock from the command line using a --password password.txt where the file ...
BokkyPooBah's user avatar
  • 40.3k
3 votes

Is it safe to create a password in a smart contract?

I won't duplicate what others have said (this is unsafe). But I will suggest a possible alternative. Rather than using a password, use a digital signature. An ECDSA signature is not susceptible to ...
James_pic's user avatar
  • 1,110
2 votes

Password to confirm transaction

The wallet prompts for a password when you create the account. Did you try passwords that you commonly use? You can attempt to brute-force it using a file of passwords that might work using https://...
Tjaden Hess's user avatar
  • 37.2k
2 votes

Password to confirm transaction

Yes, you lost it along with the password. It is recoverable with the password. What i am guessing is, your bitcoin wallet might have some password, not the shape shift.
niksmac's user avatar
  • 9,683
2 votes

How to recover account and keystore file?

Unless you reformatted the drive, you almost certainly have it somewhere. It depends on how strong the password is. If you think the password isn't very strong, there are some fairly elaborate/...
Dakota Quint's user avatar
2 votes

How to recover account and keystore file?

1) Is there any way to recover account if keystore file is lost? No. The private key effectively is the account, for all practical purposes. 2) Is there any way to recover account in case of ...
Richard Horrocks's user avatar
2 votes

is it possible I imported my wallet "Keystore" file and somehow the password files not included?

Your keystore file should contain your private key in encrypted format and your password is used to unlock the private key for making actions on the account. There is no separate password file so it ...
danielmcclure's user avatar
2 votes

How can I recover ethereum account

You cannot use the account now. The private key is your account and your password is used to decrypt it. No private key = no account An address & password without a private key to use ...
Lismore's user avatar
  • 1,303
2 votes

Mist wallet password test

Make sure Mist is running. Run this command to attach to the geth daemon: geth attach In the JavaScript console you can try this: personal.unlockAccount('ADDRESS', null, 1) You will be asked for ...
Luksor's user avatar
  • 21
2 votes

When do I need the wallet password?

in short : You need your password, because your private key is encrypted with. if you want to send a transaction or to unlock your account you will be asked to provide it, so remember it.
Badr Bellaj's user avatar
  • 18.8k
2 votes

Metamask Chrome Extension, lost password & seedpharse

No. Sorry, there's no way. Having a backup of seed phrase is required to recover the wallet. If you used a password that you generated by yourself (Not a random one), you can try to remember it. There'...
Nicolas Massart's user avatar
1 vote

Parity password to confirm request?

That would be the password for the particular ethereum account that you are trying to send the tokens from. If you've lost it, the easiest way to reset it is to simply use the restore function inside ...
Spencer's user avatar
  • 11
1 vote

Metamask account related to Geth account?

It needn't be the same. It'll be a password for unlocking accessing the private key locally.
Pedro Nobre de Figueiredo's user avatar
1 vote

keystore file without password of account can be a problem?

"Unlocking" you wallet if someone can have access to your wallet file depends of your password strength. If you really want to store all your assets in this wallet, please, keep your wallet files and ...
Nicolas Massart's user avatar
1 vote

My etherwallet.com password is overwritten by safari and only have partial private key

Try brute forcing the password of the keystore file using hashcat, see how to do it in this answer to another similar question. TL:DR If you still have the keystore file you could gain control over ...
6egic's user avatar
  • 1,327

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