PoHA — Proof of Human Attention

About

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)