If your backup requires the original machine to be fully functioning, it's a bad backup. If it requires complete reliance on a third party holding a key, that t

If your backup requires the original machine to be fully functioning, it's a bad backup. If it requires complete reliance on a third party holding a key, that they have the right and ability to revoke, it's also a bad backup. You're giving them the ability to cryptolock you at a whim.