"Iframe Post Proposal" and Unique Identifier Mechanisms Aim to Solve Facebook User ID Issue
Facebook has outlined a new “Iframe POST Proposal” as a solution to prevent User IDs from being passed through HTTP refferer headers. The mechanism embeds the UID in a HTTP POST body ensuring that it will not be exposed in any HTTP Referrer header whatsoever (encrypted or otherwise).” The system should be easy for developers to implement.
For cases when a user ID must be passed between an application and a legitimate third-party, Facebook has developed an anonymous unique identifier mechanism.
While
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