The private part of the backup key, the one used for recovery.
Get the public part of the backup key.
Try to decrypt a message that was encrypted using the public part of the backup key.
Convert the recovery key to a base 64 encoded string.
Static
Create a new random [BackupDecryptionKey].
BackupDecryptionKey
Try to create a [BackupDecryptionKey] from a base 64 encoded string.
The private part of the backup key, the one used for recovery.