With the success of single sign-on (SSO) inside the enterprise, users are calling for interoperability outside of the enterprise's security domain to outsourced services, including business process outsourcing (BPO) and software as a service (SaaS) providers, and trading partners, as well as within the enterprise to affiliates and subsidiaries.

Written for anyone interested in understanding how secure Internet SSO works, this white paper explores the limitations of current SSO implementations outside of a single security domain (including identity and access management systems and open source development) and introduces standalone secure Internet SSO as a solution.