Abstract
In practice, web-based single sign-on(SSO) protocols, such as OpenID, SAML, and OAuth, have been widely used in cloud computing services due to its convenience to users. However, these SSO authentication schemes require a fully trusted third party to help achieve mutual authentication, which makes the trusted third party being a bottleneck of security. Moreover, they do not protect users’ privacy: the trusted third party learn at which service a user logs in. To address these issues, in this work, we design an efficient and provably secure SSO protocol based on identity-based authentication using a secure channel binding, such as Transport Layer Security (TLS). The proposed SSO scheme can achieve mutual authentication without the help of the trust third party. Furthermore, our scheme can resist against various kinds of attacks and is able to provide user privacy.
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