A study carried out by the Universidad Carlos III de Madrid (UC3M), together with the Shahid Rajaee Teacher Training University of Iran, concludes that the heartbeat can be used as a biometric tool to identify people. Biometrics is the science that explores the identification of humans and animals through biological measures or physical characteristics, for example, fingerprints or the iris of the eye. In this regard, biometric-based tools are increasingly used in fields such as security, to supplement or replace password systems; and in the field of civil administration, in the registration and provision of identity documents. This research proposes an innovative technique for identifying people, based on the exclusive characteristics of their heartbeat. To do this, electrocardiograms (ECG) are used and five musical qualities are analysed: dynamics, rhythm, timbre, pitch and tonality —commonly used to characterise audio files—, applying them to the sound of heartbeats. Thus, a combination of parameters is obtained from these five qualities, which is unique for each person and has an accuracy rate of 96.6%. "Biometric identification based on cardiac recording has been studied for years, proving to be effective.
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