• Access to Third Party Applications with no additional logon
• Role-based integration of the TPA into TYPO3 navigation or content
• A sophisticated three-layer security architecture
• No need for server-to-server communication, no need for central reverse proxies
• No need for a common / shared / synchronized password database or even user database

For DirectSSO, naw.info implemented a security framework that consists of

• SSO Server (the TYPO3 extension),
• SSO Agents and
• SSO Adapters for the TPA to be integrated.

For more information, please see the architectural overview.

Or you may also want start with the DirectSSO whitepaper.