Using Authy may be a good idea. There is a slight risk of exposing the TOTP key to the cloud, but having it available on all devices (current and future) is ver

Using Authy may be a good idea. There is a slight risk of exposing the TOTP key to the cloud, but having it available on all devices (current and future) is very convenient. Authy has an option to encrypt the key using a user specified passphrase, so it is at least better than storing the raw TOTP key in the cloud.