One Tuesday morning, a user named Sarah clicked "Download" on a simple PDF titled Taxes_2025.pdf .

Sarah sat at her desk, watching a progress bar that looked like a spinning hamster wheel. She had no idea that across the ocean, a kettle was whistling and a bot was cheering for her.

: The first half of the key was generated by a small robotic arm in the company's breakroom. The arm flipped a physical switch that turned on a smart-kettle.

: Once the kettle boiled, the steam sensor sent a signal back to the server, confirming that a "human-adjacent physical event" had occurred.