Difference between atl-token and jwt token..?

[Harinath T]

Hi

Can you guys please tell us difference between the atl_token and jwt_token, is both are same..? 
I want to use Jira screens in an iframe using atl-token or jwt_token, can I use these tokens to get screens in an iframe. Can any one please guide me how to use Jira screens in an iframe.

Thanks you 

Harinath T.