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PKCE binds the OAuth 2.0 authorization code flow to a client-generated verifier so public clients can redeem codes safely. Includes a Bash example, server validation steps, and limitations.
PKCE turns an intercepted authorization code into a dead end by binding it to a client-generated secret. Here is how the flow works, where enforcement still varies, and how to check your server.
A decision guide for adopting PKCE (RFC 7636) in OAuth 2.0 authorization code flows for public clients. Covers S256 vs. plain, implementation steps with code examples, validation checklist, and server-side enforcement requirements.
PKCE binds an OAuth authorization code to the client that requested it, so an intercepted code cannot be exchanged for tokens. Here is the mechanism, a local test exchange, and the trade-offs.