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OAuth 2.0 Device Authorization & Token Exchange

Medium

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OAuth 2.0 beyond the browser

OAuth 2.0's authorization code flow works when a user can redirect through a browser. But CLIs, smart TVs, IoT devices, and server-to-server calls need different approaches.

Device Flow handles input-constrained devices. Client Credentials handles machine-to-machine. Token Introspection lets APIs validate opaque tokens. Token Exchange enables delegation chains in microservices.

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