Message Signature Validation

[Pivotal Issue 78632442][1]

[1]: https://www.pivotaltracker.com/n/projects/1163646/stories/78632442
I read through the usages, still not sure what this does or why it's there. What is the purpose of this interface? What is it trying to communicate or enforce? That the configuration we have contains certificates? It doesn't enforce that though... I would just remove the interface. :smile: