where does metamask store private key

MetaMask's browser-based version stores private keys locally in the browser's isolated Local Storage area, while mobile app versions store keys in the app's secure sandboxed storage.

Nov 10, 2024 at 09:06 am

Where Does MetaMask Store Private Keys?

1. Understanding MetaMask Key Storage

• MetaMask does not store private keys on its servers.
• Instead, private keys are stored locally on the user's device, encrypted and protected by a password.
• The password is used to generate a key that encrypts the private key.

2. Device Storage

• For browser-based MetaMask, private keys are stored in the browser's Local Storage, an isolated area of the browser's memory.
• For mobile apps, private keys are stored in the app's sandboxed storage, inaccessible to other apps.

3. Encryption Algorithm

• MetaMask uses industry-standard encryption algorithms to protect private keys.
• The AES-256 algorithm encrypts the private key with the user's password-derived encryption key.
• Additional encryption layers may be used to enhance security, depending on the specific implementation.

4. Password Security

• The security of MetaMask's private key storage largely depends on the strength of the user's password.
• Use a strong, unique password that is at least 12 characters long and contains a mix of uppercase, lowercase, numbers, and symbols.
• Never share your password with anyone or store it in an insecure location.

5. Recovery Phrase

• MetaMask generates a recovery phrase, a series of randomly selected words, when it is first set up.
• This phrase is used to recover your account and private keys in case of lost or stolen devices.
• Store the recovery phrase securely, offline, and do not share it with anyone.

6. Seed Phrase

• The seed phrase is a mnemonic phrase that represents the private key.
• It can be used to recreate the private key and access the cryptocurrency wallet.
• Keep the seed phrase safe and secure, and never share it with anyone.

7. Keyring File

• MetaMask stores private keys in a secure keyring file.
• The keyring file is encrypted with the user's password and cannot be accessed without the password.
• The keyring file is stored on the user's device and can be backed up for security.

8. Browser Extensions

• Browser extensions that connect to MetaMask may have access to some of the user's private information.
• Only install browser extensions from trusted sources and be cautious about granting them access to your MetaMask account.