The Fireblocks Non-Custodial Wallet (NCW) provides a backup and recovery mechanism to make sure that users can recover their keys even if their NCW device is lost or damaged.
The Fireblocks NCW feature allows the end-user key share on the device to be backed up. When initiating the backup, the SDK generates a random symmetric encryption key. The key share is then encrypted using this key and stored on Fireblocks servers. The encryption key can then be backed up in various ways, from downloading it to the user's computer or placing it on the user's iCloud or Google Drive using end-user authentication.
Upon recovery, the encrypted key share is fetched from Fireblocks servers, and assuming the end-user provides the correct encryption key, the recovery will be successful.
Updated about 19 hours ago