You can keep a backup of your Secret Key without your email address or password included in your recovery kit. Hardcopy or digital copy (cloud storage, etc) The Secret Key is fairly useless without those additional details. Many folks have multiple backups that way, so even if someone were to access your Secret Key, it wouldn't do much for them. If you have 2FA enabled on your 1Password account, that would provide an additional layer of protection as well.