This is not a question about journaling; this is just a question about encrypting data. There are tons of ways to do it that meet your threat model. You can j

This is not a question about journaling; this is just a question about encrypting data. There are tons of ways to do it that meet your threat model. You can just use a linux machine with disk encryption.. it happens by magic if you click the option for 'encrypt my home directory' when installing ubuntu. You can use bitlocker (also built in) in windows. If you happen to use VIM, it has built in encryption as well that is extremely simple to use. Other options would be something like pgp, or pen and paper and a lockbox.