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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.

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