User authentication by a wearable device

A wearable device, specifically designed to be worn on a finger, can identify and authenticate its user. It does this by first learning the user's unique body signals over time. When the device is placed on a finger, it senses this using a light detector, then collects physiological data from the finger, and if it matches the learned profile, it confirms the user's identity. This allows the device to perform actions like making a payment or gathering more health data, as long as it remains on the finger.

Why it matters: The reliability of continuous, passive biometric authentication from miniaturized finger-worn sensors has significantly improved since 2022, making this approach more viable for secure payment transactions.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedCustom wearable hardware, biometric sensors, software logic.

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