University of Wisconsin–River Falls
Single Sign-On (SSO) allows users to only log on once and then access different services via automatic authentication by using the same credential. However, most existing SSO schemes do not satisfy security notions or require a high trust level on a Trusted Third Party (TTP), even though SSO has become popular in new distributed systems and computer networks. Motivated by this fact, the authors formalize a new security model of single sign-on, which not only satisfies strong security notions but also has a low trust level on TTP. They then propose a generic construction of SSO from nominative signatures, and present concrete initialization.