From Fedora Project Wiki
The New Fedora Signing Key
The Fedora Project recently re-signed all of its packages with a new key. The story regarding the key can be found here. Contact the release engineering team via IRC in #fedora-devel (irc.freenode.org) or via email to rel-eng@fedoraproject.org for more information.
Enabling the New Signing Key
The plan for implementing the new key is very fluid, therefore changes can be expected. This page will be updated as new information is obtained.