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The Trezor passphrase feature adds an extra layer of security to your hardware wallet by encrypting your recovery seed with an additional passphrase. Here's how it works and some best practices for creating and managing a secure passphrase:

How it works:

• By default, your Trezor device uses a recovery seed (a list of 12 or 24 words) to generate your private keys and access your cryptocurrency.

• With the passphrase feature, you can add an extra word or series of words to your recovery seed, effectively creating a new, encrypted wallet.

• To access this wallet, you need both your recovery seed and the passphrase. Without the passphrase, even if someone gains access to your recovery seed, they won't be able to access your funds.

Best Practices:

1. Choose a Strong Passphrase: Your passphrase should be strong and unique, just like a strong password. Avoid common phrases, dictionary words, or easily guessable combinations. Instead, use a combination of letters, numbers, and special characters.

2. Make it Memorable but Unique: While your passphrase should be strong, it's also important that you can remember it. Consider using a memorable phrase or sentence that only you would know. Avoid using personal information or easily guessable phrases.

3. Do Not Reuse Passphrases: Each Trezor wallet can have its own unique passphrase. Avoid reusing passphrases across multiple wallets or accounts, as this increases the risk if one passphrase is compromised.

4. Keep it Secure: Treat your passphrase with the same level of security as your recovery seed. Do not write it down in plain text or store it electronically where it could be compromised. Consider memorizing it or using a secure method of storage such as a hardware security device or encrypted password manager.

5. Practice Recovery: Before relying on your passphrase for security, practice recovering your wallet with both your recovery seed and passphrase. Make sure you can successfully access your funds using both.

6. Enable and Disable Carefully: If you choose to use a passphrase, be mindful when enabling or disabling it on your Trezor device. Enabling the passphrase will create a new, encrypted wallet, while disabling it will revert to your original wallet without the passphrase. Ensure you understand the implications before making changes.

By following these best practices, you can enhance the security of your Trezor hardware wallet with the passphrase feature while maintaining accessibility and ease of use.