* Jakub Wilk <firstname.lastname@example.org>, 2014-07-30, 22:26:
WARNING: The following packages cannot be authenticated! apt-transport-https Install these packages without verification? [y/N] E: Some packages could not be authenticated
But if the authentication troubles are really related to the HTTP->HTTPS switch, then it's a bug in apt that should be fixed.
Filed as #756614. -- Jakub Wilk