![]() ![]() ![]() The SP then uses this assertion to grant access to the user. When a user attempts to access a service, the SP sends a request to the IDP, which then authenticates the user and generates a SAML assertion containing information about the user's identity and privileges. SAML works by using XML-based messages to communicate between a service provider (SP) and an identity provider (IDP). SAML, which stands for Security Assertion Markup Language, is a standard protocol used for enabling SSO and exchanging authentication and authorization data between different systems. This can be more convenient for users who are not sure which application they want to use or who want to discover new applications that they are authorized to use. The main advantage of an IdP-initiated flow is that it provides a centralized portal for users to access all of their authorized applications and services. The user selects the desired application, and the IdP sends a SAML assertion to the SP, granting the user access. The IdP then presents the user with a list of available applications or services that the user is authorized to access. In an IdP-initiated flow, the user begins by accessing the IdP portal or website. The benefit of this flow is that it provides a direct path to the desired app or service, which can be more convenient for users who know what they want and want to access it quickly. The IdP verifies the user's identity and sends back a SAML assertion to the SP, which then allows the user access to the requested app or service. The SP then sends an authentication request to the IdP (LastPass) on behalf of the user. In an SP-initiated flow, the user starts by attempting to access their SP. The method of initiation used depends on the SP. LastPass supports two ways of initiating a SAML SSO. Depending on what the SP can support, the SAML Response may contain additional information, such as user profile and/or group/role information. As the IdP, LastPass generates a SAML Response that contains the actual assertion of the authenticated user. The SP generates a SAML Request (also known as an authentication request) to ‘request’ an authentication from the IdP. When a user with LastPass SAML SSO enabled initiates a login, they are interacting with the SPs – typically a website or application they are trying to access. ![]()
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