I assume these are processed by secure hardware inside the plane, if you could just copy them after being loaded the entire exercise with the contractors would

I assume these are processed by secure hardware inside the plane, if you could just copy them after being loaded the entire exercise with the contractors would be rather pointless. So I assume after the contractors load the codes into the plane, they are already protected by regulations governing access and sale/export of the plane, which probably amount to roughly "Remember, no russians".