The Ethereum (ETH) vault currently is only available on mobile and is backed up with one seed phrase, which lets you access your ETH, even if you lose access to your Nuri account. When you set up your Ethereum vault, a cryptographic key is generated and locked away in your smartphone security module. It can only be accessed by the Nuri mobile app and only upon using biometric authentication. Every transaction requires a confirmation from your device key, meaning no one else can access your funds – not even the Nuri team.