Share credential from main frame to iframe

[GuillaumeArnaud]

Hi,

We have a main application that uses the portal's oauth2 authentication. In this app there is an iframe which contains a webapp with a private card. When I go to this part of the application, I am asked to identify myself a second time. :

Is ther a mean to share authentication from main app to iframe ?

perhaps we can send a token in params or directly in url of webapp in iframe? 

Share authNamespace from main app to iframe? How can i do ?

Thanks.

Guillaume