Right, Signed Cookies. JWT doesn't make the claim that it's a new concept, you are assuming as much. It's a standard and as you correctly gleaned and like most

Right, Signed Cookies. JWT doesn't make the claim that it's a new concept, you are assuming as much. It's a standard and as you correctly gleaned and like most other standards, comes with a lot of benefits, best practices, is battle tested and ready-to-use in your favorite frameworks. It becomes even more useful if you application serves multiple clients such as browsers, iOS applications and so forth because you can hit the ground running without having to reinvent anything.