> I'm purely talking about the ability of someone to sign their own emails without being dependent on a monopoly like Gmail to do it for them. What is blockcha

> I'm purely talking about the ability of someone to sign their own emails without being dependent on a monopoly like Gmail to do it for them. What is blockchain adding for this usecase that's beyond what PGP [1] offers? [1] https://en.wikipedia.org/wiki/Pretty_Good_Privacy https://en.wikipedia.org/wiki/Pretty_Good_Privacy