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Blood pulse, cardiac pulse / Pulsations cardiaques

Recognition using the blood pulse shape or the electrocardiogram has been proposed, but there was low activity on this subject until 2013 when a product was announced.
La reconnaissance par la forme du pouls sanguin ou de l'électrocardiogramme a été proposé, mais il n'y avait que peu d'activité dans ce domaine jusqu'en 2013, lorsque qu'un produit a été annoncé.

Pulse reading

Pulse reading is performed using the same material than pulse oxymetry, with two LEDs and a photodiode, to read the blood pulse shape. One LED is enough if you just want to acquire the blood pulse.
La lecture s'effectue avec le même matériel que pour l'oxymétrie par le pouls, à l'aide de 2 DEL et d'une photodiode. Une seule DEL suffit si vous voulez juste acquérir le pouls.
capteur de pouls pour oxymétrie

exemple d'oxymètre
A pulse oxymeter / Un oxymètre de pouls

Blood pulse waveform / forme d'onde du pouls

Electrocardiogram / ECG / EKG

Everyone knows how a regular EKG is done, using several electrodes, close to the heart.

But the minimum requirement to acquire an EKG is form a loop with the heart, for instance between the two hands. Electrodes at the end of a finger is not enough. On connait généralement la manière de réaliser un ECG, avec des électrodes disposées plutôt près du coeur. Mais il faut au minimum 2 électrodes et former une boucle dans le corps, par exemple en utilisant les deux mains. Au bout d'un doigt, il n'y a pratiquement pas de signal.

Search for "handheld ECG" for more info.

Proposed systems

  • (1996) The Klipsh School of Electrical and Computer Engineering, New Mexico State University has published an article:
    Use of Blood Pulse Signature for Identity Verification (Ludeman & als)

  • (2004 Jan) Union Recovery (formerly Tarian 2001) has proposed a blood pulse recognition system, but there is no commercially availble device (US patent 7536557).

  • (2011) Unveiling the Biometric Potential of Finger-Based ECG Signals (André Lourenço, Hugo Silva, and Ana Fred): finger-based ECG biometric system. The proposed approach allowed us to obtain a 94,3% recognition rate in subject identification and a 13,0% EER in subject authentication. By applying a user-tuned threshold selection method, authentication results were further improved to a 10,1% EER

  • (2013) Bionym will propose the Nymi, a plastic wristband using a biometric sensor to authenticate identity through a person’s unique electrocardiogram.
  • Bionym has developed the first wearable authentication device that utilizes a user's Electrocardiogram (ECG) to validate a person’s identity. The Nymi has two electrodes, one on the wrist and one on the top. To authenticate, a user must attach the Nymi, and then place their finger on the top electrode to complete the electric current. A user only needs to validate their identity once, until the Nymi is removed. The closed loop keeps the Nymi in an authenticated state, removing all need for repeated prompts (such as in fingerprint scanning or PIN requests).
    Once authenticated, the Nymi communicates the user’s identity to a device (such as a smartphone, vehicle, elctronic lock, or even a smart environtment) using Bluetooth Low Energy (BLE).
    The Nymi also has an integrated accelerometer and gyroscope, which will pick up on your movements, allowing for simple, task-specific gesture recognition. Motion sensing works in unison with proximity detection and identity authentication to ensure only you can remotely access the devices you want to engage with.

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