Archive for August 2010

Weighing in on Pull vs. Push

August 20, 2010

Bob Blakley certainly hit a nerve with his keynote presentation at Catalyst this year. He had been working on the concepts for his “Pull” identity architecture for some time and it was well received by the audience, sparking a lot of discussion and debate. Since the conference, we’ve witnessed a terrific continuation of the debate through the excellent posts by Nishant Kaushik and Ben Goodman. Nishant has argued in favor of “Pull” here and here, while Ben has taken an opposing view here and here.

This type of discussion often takes place when we speak to enterprises about adopting externalized authorization managers instead of relying on historical approaches – you don’t always (or rarely) open up legacy applications unless there is a specific business reason to do so. However, as Nishant points out, enterprises realize the value and opportunity of moving forward with a “Pull” based approach. Existing models, while workable in many situations, may not be flexible enough for modern business organizations that need to operate in a more dynamic fashion while maintaining security and regulatory compliance.

A final point to make is this: for every application that adopts the “Pull” model, you have one less application that requires provisioning or data synchronization. I refer to this type of application as stateless, from an identity perspective. In this case, users don’t authenticate to the application, they authenticate via a service that may be hosted by the enterprise or an external entity – no extra accounts or credentials needed. For access control, the application calls to an externalized authorization manager (EAM) – here policies define what the user can do within the application. If additional attributes are needed, they can be loaded from existing authoritative sources by the EAM – no extra data synchronization or user provisioning is needed. Now this model will not work for every application or every scenario, but it is a model that is implementable today and many in the industry are enthusiastically adopting it. For applications that still require a monolithic approach, then I agree with Ben that your IdM  tools must indeed be very intelligent.

Instigating Again – XACML 3.0 Interop

August 4, 2010

One of the points I made during my vendor lightning round session at Burton Catalyst last week was that the industry should be looking ahead to an XACML 3.0 interop in 2011, perhaps at the next Catalyst conference. Catalyst was the site of the first ever XACML interop demonstration back in 2007 and would be a great venue again next year. It is expected that more vendors will adopt version 3.0 once OASIS completes formal standardization (currently a committee draft and will shortly be voted on as committee standard).

There are some basic usage scenarios that can be tested, such as implementing policies authored in one vendors PAP in another vendor’s PDP. Another scenario that is frequently mentioned is integrating a PDP with other vendor’s PEPs. What scenarios are most important to you?

Another item to consider is whether the industry needs certified conformance testing of XACML products. This capability has been very valuable to the federation market, but there is a lot of ambiguity today for externalized authorization manager products. If vendor products were certified as conformant by independent party, would that be valuable to you?

Finally, interoperability and standards conformance are more important than ever for the externalized authorization manager market. Demand is increasing from enterprises, SaaS vendors, cloud service providers, and others. These prospective implementers of XACML-based solutions must be confident of the functionality supported in commercial products and they should have a clear understanding of interoperability capabilities. That is why we are calling on other XACML vendors to join us in planning for the next interop event and also to seriously consider sponsoring a certification process.

image credit:

Return to Catalyst

August 2, 2010

Last week marked my first visit to a Catalyst conference since departing from Burton Group earlier this year. Let’s just say it is a LOT more relaxing to be there as an attendee and speaker than as part of the production team!!

I found the latest Catalyst to be informative, entertaining, and it exuded a high level of energy – just what you want in a conference. In the identity management sessions, I appreciated the focus on externalized authorization, virtual directories, and federation. The Concordia workshop on authorization was well attended and showcased progress made in a number of areas in the recent past. The workshop also highlighted some areas where the industry can focus energy, such as:

Burton Group has a great formula for the Catalyst Conference and apparently Gartner agrees since Catalyst 2011 in San Diego was announced last Thursday. I plan to be there, how about you?


Get every new post delivered to your Inbox.