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Dex
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Effortless enterprise authentication at Grab: Dex in action
Grab built Concedo to centralise access management, authentication, and authorisation across internal applications and external platforms. Its customised Google OAuth2.0-based mechanism created integration challenges with systems such as Databricks and Datadog, producing fragmented sign-on experiences and administrative overhead. To standardise identity, the team adopted OpenID Connect (OIDC) and used Dex, a federated OpenID Connect provider that aggregates identity providers and issues standardised OIDC tokens. Dex supports single sign-on, multiple identity providers, token delegation between trusted peer services, and a kill switch that can redirect traffic during an identity provider outage. The implementation separated application authentication concerns and established a single identity source, while a future phase will address fragmented authorisation through a unified model.
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