Prompt: Map these app types to their recommended OAuth flows: SPA, Regular Web, Native, M2M.
Post to complete: 4 bullets in a pattern of Type → Flow → Why.
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OAuth flows map to different app types:
SPA (Single Page Application)
→ Implicit Flow
→ Why: SPAs run entirely in the browser, so they typically use the Implicit Flow to securely retrieve access tokens without involving backend servers. This flow avoids exposing client secrets in client-side code, aligning with the stateless, browser-based nature of SPAs.
Regular Web App
→ Authorization Code Flow
→ Why: Regular web apps involve both front-end and back-end components, where the back-end can securely store client secrets. The Authorization Code Flow allows for the exchange of an authorization code for an access token, which is suitable for apps that need server-side token storage and better security.
Native App
→ Authorization Code Flow with PKCE
→ Why: Native apps (like mobile apps) use the Authorization Code Flow with Proof Key for Code Exchange (PKCE) to prevent code interception. PKCE adds an extra layer of security by requiring the app to prove it is the same client that initiated the authorization request, mitigating risks like code injection in insecure environments.
M2M (Machine-to-Machine)
→ Client Credentials Flow
→ Why: M2M apps don’t have a user involved and instead authenticate as a machine or service. The Client Credentials Flow allows these apps to authenticate directly with the authorization server using their own credentials (client ID and secret), bypassing user consent entirely.
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