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OAuth is an authorization protocol, rather than an authentication protocol. Using OAuth on its own as an authentication method may be referred to as pseudo-authentication. [26] The following diagrams highlight the differences between using OpenID (specifically designed as an authentication protocol) and OAuth for authorization.
The diagram from [5] (see right) highlights key additions that UMA makes to OAuth 2.0. In a typical OAuth flow: A resource owner (RO), a human who uses a client application, is redirected to an authorization server (AS) to log in and consent to the issuance of an access token.
Free Software: Open Source Single Sign-On Server Keycloak (Red Hat Single Sign-On) Red Hat: Open source: Yes: Federated SSO (LDAP and Active Directory), standard protocols (OpenID Connect, OAuth 2.0 and SAML 2.0) for Web, clustering and single sign on. Red Hat Single Sign-On is version of Keycloak for which RedHat provides commercial support ...
The eXtensible Access Control Markup Language (XACML) is an XML-based standard markup language for specifying access control policies. The standard, published by OASIS, defines a declarative fine-grained, attribute-based access control policy language, an architecture, and a processing model describing how to evaluate access requests according to the rules defined in policies.
OpenID Connect (OIDC) is an identity layer on top of OAuth. In the domain model associated with OIDC, an identity provider is a special type of OAuth 2.0 authorization server. Specifically, a system entity called an OpenID Provider issues JSON-formatted identity tokens to OIDC relying parties via a RESTful HTTP API.
Version 2.0 of the Shibboleth software was a major upgrade released in March 2008. [2] It included both IdP and SP components, but, more importantly, Shibboleth 2.0 supported SAML 2.0. The Shibboleth and SAML protocols were developed during the same timeframe.
As with all SMTP extensions, SMTP AUTH is advertised in the EHLO response, along with a list of supported authentication methods. These methods may change after issuing STARTTLS, typically allowing plain text passwords in the latter case only.
The CAS protocol involves at least three parties: a client web browser, the web application requesting authentication, and the CAS server.It may also involve a back-end service, such as a database server, that does not have its own HTTP interface but communicates with a web application.