8 votes

Is 12-word seed phrase safe enough?

In short: 12-word seed has enough entropy to be safe against brute force attack. First of all not all 132 bits are random. Seed uses some kind of control sum. Lets talk about 128 bits of entropy. Lets ...
Sergey's user avatar
  • 181
5 votes
Accepted

Wallet passphrase uniqueness (noob question)

The chances of someone "brute-forcing" or guessing your seed is extremely slim. There are more than 5 duodecillion possible combinations of twelve-word seeds. Just so you get an idea of how big that ...
Monstrum's user avatar
  • 1,334
4 votes

bitcoin core command line walletpassphrase incorrect but works for the main system?

If your passphrase contains spaces or special characters, you will need to wrap it with single quotes (') so that the debug console can properly parse your passphrase. For example, if your passphrase ...
Ava Chow's user avatar
  • 70.4k
4 votes

Need help to recover blpckchain.info wallet, my wife forgot her password and the brute force with btcrecover is not catching the password

Is there a way to just manually transfer the btc from the old wallet into a new wallet we do have access to No. You need at least one of the things you have none of working wallet. PIN or password ...
RedGrittyBrick's user avatar
4 votes

Help recovering BitPay wallet Reward!

What can I do? You could find tools that automate the trying of various combinations of seed-words. Some are mentioned in similar questions here. For example btctools, btcrecover. Use them or adapt ...
RedGrittyBrick's user avatar
4 votes
Accepted

Check your wallet.dat passphrase

Yes, open the command console inside the GUI and type walletpassphrase "your password" 1 This will only succeed if the password is correct. If you have multiple wallets, make sure you have ...
meshcollider's user avatar
  • 11.8k
3 votes

19 out of 24 words of BIP39 passphrase (brute-force last 5?)

With 4 unknown words there is around 1.76 trillion possible mnemonics and John Cantrell was able to write and setup network of CPU and GPU solvers which successfully checked 1 trillion mnemonics in 30 ...
kenorb's user avatar
  • 189
3 votes

I forgot my bitcoin core passphrase. Is there anyway I can recover?

No. The whole point of strong encryption is that it is impossible to recover the data without the passphrase. You can: Keep trying to brute force (maybe with faster computers, or a better initial ...
Nate Eldredge's user avatar
3 votes
Accepted

Does bitcoin.conf expand environment variables?

No, bitcoin core does not expand environment variables in bitcoin.conf. See here to see how options are parsed. You can expand environment variables as arguments for bitcoind: $ bitcoind -rpcuser="$...
ohmyfromage's user avatar
3 votes

Can you have a password based cryptocurrency?

In particular, is there a way to make it so that it is impossible to know if a transaction signed with a password is correct unless its part of a mined block? This way, even if your password only ...
Nick ODell's user avatar
  • 29.4k
3 votes
Accepted

How to restore my Bitcoin Core wallet from seed phrase

Bitcoin Core is not affiliated with the website you downloaded the node installer from - bitsblock.io, and the official Bitcoin Core client does not provide functionality you ask about. I noticed that ...
streamofstars's user avatar
3 votes

Using more than a 12 word mnemonic phrase

Why roughly 128 bits, and not exactly? Reading BIP39, 12 words seems to imply exactly 128 bits of entropy. Why the additional entropy provided by using more than 12 words is not used? This is ...
Pieter Wuille's user avatar
3 votes
Accepted

25th word / pasphrase security length

If you're using a 24-word BIP39 seed phrase, that encodes 256 bits of entropy. A passphrase also needs 256 bits of entropy to contribute the same level of security. Estimating the entropy of a ...
Vojtěch Strnad's user avatar
3 votes
Accepted

Is password important in most installed wallets?

The password encrypts the wallet file itself, protecting all your secret keys in any situation that an attacker gains access to your files. This includes physical access, but also viruses/malware, ...
meshcollider's user avatar
  • 11.8k
3 votes

Is password important in most installed wallets?

As Meshcollider points out, the password file encrypts the local copy of the wallet (file), which includes the seed phrase. In other words, an attacker needs either: The seed phrase The wallet file ...
Pieter Wuille's user avatar
3 votes
Accepted

Does specifying the optional passphrase after regenerating a wallet with the same BIP39 word list as earlier create a new, different and empty wallet?

The optional passphrase is included in the generation of the root secret, and adding one after the fact will therefore change the generated secret: Using a passphrase comes with a significant amount ...
cdecker's user avatar
  • 9,508
2 votes

Is 12-word seed phrase safe enough?

The security in bits of a 12-word mnemonic that has a valid checksum as per BIP39 is not 132 bits, but rather 128 bits, as the last 4 bits are determined based on the first 128 bits - the initial &...
Steven Hatzakis's user avatar
2 votes

BIP38 Encryption

how in the heck am I supposed to retrieve my first purchase ever from this paper wallet if the passcode I believe I used, is not working? Sadly, if you created a BIP38 paper wallet and lost the ...
chytrik's user avatar
  • 18.3k
2 votes

Wallet passphrase uniqueness (noob question)

(Some wallets that generate word lists for recovery also allow a user-created passphrase, so I'm using "recovery seed" to denote the word list.) I'm not familiar with Mycelium specifically, but many ...
brec's user avatar
  • 347
2 votes
Accepted

Recovering Hive Wallet private key with passphrase

Might want to experiment with libbitcoin's command line interface called bitcoin explorer (bx). Instructions for using v3.0 bx commands used below are found here in the right pane. Assuming there is ...
skaht's user avatar
  • 3,057
2 votes
Accepted

Blockchain.com passphrase pattern ?

Current blockchain.info wallets use the BIP39 wordlist, which you can find for various languages at https://github.com/bitcoin/bips/blob/master/bip-0039/bip-0039-wordlists.md/ Previous versions have ...
Raghav Sood's user avatar
2 votes

19 out of 24 words of BIP39 passphrase (brute-force last 5?)

You have three options here: Using a GPU implementation of the Gurnec´s Seed Recovery script Use Hashcat / JTR, where PBKDF2-HMAC-SHA512 is already implemented. Use brainflayer, similar to Gurnecs ...
fran2k's user avatar
  • 51
2 votes

What are the constraints on Bitcoin Core's wallet passphrase?

is the passphrase a phrase I come up with? Yes. It is used to encrypt the wallet so that only you can use it. is it just one word or a sequence of words? It is up to you what characters to type and ...
RedGrittyBrick's user avatar
2 votes
Accepted

Can you change password in Wasabi Wallet?

Technically you can change the password (with code currently.) Let's assume you already did. In that case note that Wasabi used your old password as the passphrase (the 13th mnemonic word) and while ...
nopara73's user avatar
  • 816
2 votes
Accepted

Does inserting a passphrase also changes the private key of a wallet.dat file

When encrypting a wallet, the wallet will generate new keys. If you transfer to those keys, the old, unencrypted backup will not be able to spend the funds. Only the encrypted wallet will have the ...
meshcollider's user avatar
  • 11.8k
2 votes
Accepted

Addresses After passphrase generation in wallet.dat

Will EVERY address I'll generate AFTER the passphrase will NOT be accessible to the old copy (Before the passphrase) Correct. When encrypting a wallet, every key/address used from that point on will ...
meshcollider's user avatar
  • 11.8k
2 votes
Accepted

How to use Bitcoin Explorer (bx) for BIP39?

adapted from O'Reilly's Mastering Bitcoin by Andreas Antonopoulos Note that the bx command set has since changed significantly. Q1 Presumably the checksumming was included? $ bx seed -b 512 > ...
RedGrittyBrick's user avatar
2 votes
Accepted

Is passphrase (the 25th word) using open source algorithms? Can I recover the passphrase on any hardware wallets?

Most wallets use the same algorithm, as it is an open standard, BIP-39. A notable exception is Electrum, which uses a similar, but slightly different mechanism. This is publicly documented and can be ...
Mark H's user avatar
  • 3,334
2 votes
Accepted

Lost access to ledger hidden wallet

Is there anyway I can get access to these hidden wallets without the passphrase? None whatsoever. I am offering a small reward if I get it back. Expect to be overwhelmed by offers from skilled ...
RedGrittyBrick's user avatar

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