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This paper presents the extended development of the AmTRUE project implementing the SSO-two factor authentication and RBAC authorization in the multiple applications and multi-domain environment. The authentication and authorization are based on the X.509 public key certificate and privilege management infrastructure (PMI). In our model, we introduce the security assertion markup language (SAML) to support the exchange of authentication and authorization information. SAML enables the single sign-on (SSO) authentication in the multi-organization to be more manageable and scalable. Besides, we enhance our system to be capable to work with the access control policies of the organizations using XACML This promotes the flexibility of AmTRUE for the seamless interoperation with another standard access control policy. Finally, the implementation is presented.