PoHA — Proof of Human Attention

Badge your messages as typed by hand.

PoHA (Proof of Human Attention) is a Chrome extension that lets you prove your messages were typed by hand, not generated by AI. HOW IT WORKS As you type in any text field — Gmail, X/Twitter, LinkedIn, or anywhere else — PoHA quietly observes your typing patterns: rhythm, pauses, corrections, and keystroke dynamics. These signals build a confidence score shown as a floating indicator next to your compose box. When the indicator turns green, click it to badge your message with a short verification link (e.g. poha.ink/abc12). Anyone can click that link to verify the attestation is authentic. WHAT GETS MEASURED • Typing rhythm and inter-keystroke timing • Natural pauses and corrections • Paste ratio (how much was typed vs pasted) • Overall composition duration PRIVACY FIRST • No text content is stored — only a one-way hash • All signals are processed locally in your browser • Only the cryptographic attestation is sent to poha.ink • Ed25519 signing keys are generated and stored on your device • No tracking, no analytics, no account required FEATURES • Works on any website with text fields • Floating indicator with live confidence score • One-click badge insertion • Badge history in the popup • Optional calibration telemetry (opt-in only)