"Identity as a Service" is now a buzzword pushed by big vendors sell their identity management suites. Unfortunately, identity as a service does not solve the basic challenges that managing access control is the harder - and often ignored - problem. It is somewhat disappointing to me that the Cloud Security Alliance published a very narrowly scoped docucment "Domain 12 Guidance for Identity & Access Management" back in April 2010 that covers Identity-as-a-Service, but leaves out Authorization-as-a-Service (the document is sponsored by a big identity vendor, which explains a lot...).
This blog has advocated the use of model driven security to implement "Authorization as a service", or more precisely "Security & Compliance Automation as a Service" (SCaaS), for some time. Scientific papers are being presented at various conferences over the coming months, contact us if you would like to know more.
*UPDATE*: a discussion on the Cloud Security Allicance Trusted Cloud Initiative Linkedin forum discusses the issue.
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