Identity Mediation for PSD2

Partners, mergers, legal entities, government entities, customers all need to work together in this era, while honoring the boundaries they should work within. This is with link to my previous post on challenges of future IAM requirements arising with increased interchangeability requirements between diversified parties.
  1. Challenges of Future IAM (concerned with Mergers , Acquisitions, Startups) -http://pushpalankajaya.blogspot.com/2017/07/challenges-of-future-iam-concerned-with.html
  2. Future of Identity and Access Management (IAM)- http://pushpalankajaya.blogspot.com/2017/07/future-of-identity-and-access.html
This need is much more emphasized with the new regulations such as PSD2 in EU region that is putting foundation for Open Banking. While these standards define guidance for implementation interfaces, 
  • End user authentication and authorization
  • Third party authentication and authorization
  • Identity mgt of internal staff,
 has hidden needs of identity mediation. Federated authentication is going to be a key feature requirement in Open banking for any institution that is looking for a long term journey in the arena as a giant.

With the Strong Customer Authentication requirements, it also highlights the need of an 'ESB like' power in an identity mediation solution. Without being limited to identity mediation between different protocols, a comprehensive solution needs to be flexible and powerful enough to easily define the sequences the authentication and authorization flow should follow. 

How about having an 'ESB like' Identity Mediation Engine that is based on event driven architecture, written in functional programming paradigm and can be dynamically configured in JavaScript? I have seen Identity Mediation Solutions written in OOP paradigm and configured via XML or a UI, then solutions that are written in OOP paradigm, but sequence can be handled via Java Script syntax.what's next?

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