Serco has access to the federal BRIDGE certification trust.

The federal BRIDGE certification is a method for shared certification authority as it relates to secure certificates for authentication and sharing of data, resources, and systems.

Long story short, it could be used as a method to transfer and share information.

JC and his of the bridge:

https:// www.hooktube.com/watch?v=LwBPHwXcMso

https:// www.youtube.com/results?search_query=federal+bridge+certification+authority

5 EYES also uses this "trust" arrangement as far as I know…