Gartner Research

Enterprise Single Sign-On and the Perennial Tactical Legacy

Published: 26 March 2012

ID: G00227153

Analyst(s): Robin Wilton


Few enterprises enjoy the integration challenges of an all-encompassing enterprise single sign-on (eSSO) deployment, but the persistence of non-Web-enabled applications means that many have no choice. As vendors and enterprise customers alike turn their attention to newer service delivery models (for example, federation, Web services, mobile applications and cloud services), strategic questions arise about how to accommodate legacy applications under the eSSO umbrella. This guidance document analyzes the problem and helps readers navigate existing Gartner documents on the topic of eSSO.

Table Of Contents




  • What Is eSSO?
    • Legacy vs. Other Authentication Approaches
  • Commercial Considerations
    • Maturity of the Vendor Landscape
    • Risk Aggregation
  • Architectural Considerations
    • eSSO as One Element of the IAM Ecosystem
    • eSSO and IdM
    • Portals
    • End-User Platforms
  • Conclusions

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