British bank uses heart beat to identify the person

 Bionym, is going public with its first device after research and development. It centers on a person's electrocardiogram, a measure not of your heart rate but of the electrical activity generated by your heart. A person's ECG is dependent on the size, position, and physiology of their heart, and it's completely unique to every person. It's as unique to you as your fingerprint, and unlike your fingerprint you're not leaving your ECG on glasses or windows or cell phones everywhere you go. 

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