Electrocardiogram (ECG) as a Biometric Characteristic: A Review

iometric systems are mostly used as person identification or verification systems. In the last few decades, the Electrocardiogram (ECG) has been introduced as a most powerful biometric tool for personal/individual identification. ECG has unique cardiac feature to each individual which motivated its use in various identification systems. Recent developments have also shown that person identification by ECG give more reliable and accurate results than other biometric characteristics. The majority of publications in the ECG based biometrics system have focused on extracting fiducial based features for identification task of an individual. The main advantage of using ECG is that it guarantees high accuracy even in abnormal cases. Furthermore, it possesses low sensitivity to noise. In this paper, ECG is being discussed as a biometric characteristic. KeywordsECG; ECG fiducial method; ECG non-fiducial method; Feature extracted; Classification; PCA (principal component analysis); LDA (linear discriminant analysis); WT (wavelet transformation); LPC (Linear Prediction