@LWFlouisa Doesn't encryption for email sort of already exist due to GPG? I find it really easy to set up in Outlook through the add-on. available also natively in Office 365, though my Office 365 license doesn't have it, I don't think. Encryption ought to be able to be available for everyone, not just those who are more technical. I am, of course, but not everyone is.
@LWFlouisa Though what GPG4Win folks did, I do have to give it up for them. It took me a second to set up the plugin in Outlook. I was then able to decrypt a message received from the Kraken cryptocurrency exchange.