Passphrase
A passphrase is an additional security layer for cryptocurrency wallets, acting as a 25th word in the BIP39 seed phrase, protecting access to hidden wallets.
What Is a Passphrase?
A Passphrase is an additional layer of security for cryptocurrency wallets, often referred to as a '25th word' or 'hidden wallet passphrase.' It is used in combination with a standard BIP39 seed phrase to provide an extra level of protection for a wallet. A passphrase is a string of characters that a user chooses, which is required to access a or to unlock the funds associated with a specific seed phrase.
In practice, a passphrase functions as a secret key that is not stored on the blockchain. When creating a wallet, users generate a BIP39 seed phrase, typically consisting of 12 or 24 words. By adding a passphrase, the user creates a unique, encrypted version of the wallet, which can only be accessed with both the seed phrase and the correct passphrase.
The passphrase enhances wallet security by preventing unauthorized access. Even if someone gains access to the BIP39 seed phrase, they will not be able to access the hidden wallet without the correct passphrase. This is particularly useful for safeguarding funds in high-value wallets or for managing multiple wallets with different access credentials.
There are no universal rules for creating a passphrase, but it should be long, complex, and unique to reduce the risk of brute-force attacks. Passphrases can vary in length and can include numbers, special characters, and even spaces. Users must remember their passphrase, as it cannot be recovered if forgotten. If lost, access to the wallet may be permanently lost as well.
Cryptocurrency is a digital or virtual currency secured by cryptography, operating on decentralized blockchain networks to enable secure, peer-to-peer transactions.
Read full definitionBIP39 is a standard for generating mnemonic seed phrases that are used to create deterministic wallets and securely back up cryptocurrency private keys.
Read full definitionReal-World Examples
Example 1: When setting up a Ledger hardware wallet, you are asked to choose a BIP39 seed phrase. After this, you can opt to add a passphrase for added security, which acts as a '25th word.' Without the passphrase, even if someone finds your seed phrase, they cannot access your .
Example 2: Sarah has a high-value Bitcoin wallet. She uses a passphrase in addition to her 24-word seed phrase to protect her funds. This way, even if her seed phrase is compromised, the passphrase is required to access the wallet.
Example 3: A user who creates multiple wallets for different purposes can assign a passphrase to each one. For example, their personal wallet may have one passphrase, while their investment wallet has another. Each passphrase keeps the wallets secure and distinct from each other.
Example 4: If you forget your passphrase, you will permanently lose access to your wallet, even with the correct seed phrase. This is why it is crucial to securely store your passphrase in a safe, offline location.
Ledger is a brand of hardware wallets that securely store cryptocurrency private keys offline, such as the Ledger Nano series.
Read full definitionBIP39 is a standard for generating mnemonic seed phrases that are used to create deterministic wallets and securely back up cryptocurrency private keys.
Read full definitionElectrum is a lightweight Bitcoin wallet that allows users to store, send, and receive Bitcoin securely. It is known for its speed and low resource usage.
Read full definitionHardware Wallets by Passphrase
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