Biometrics is a secure alternative for traditional methods in identity verification . Electrocardiogram (ECG) is an emerging biometric security mechanism. Biometric measures are used in many different areas and industries to provide a relatively high level security. The word biological is based on DeoxyriboNucleic Acid (DNA), behavioural is based on gait or keystroke dynamic, and morphological is based on uniqueness for all people like fingerprint or face etc. . ECG is combined with commonly used face biometric and fingerprint biometric. The uniqueness of the electrocardiogram signal has encouraged its use in building different biometric identification systems. It is also a source of supplementary information to a multi biometric system; it shows moderate performance in a uni-model framework. The concerns involved to use ECG as a biometric for individual authentication are the lack of standardization in signal features and the presence of acquisition variations. Otherwise this make the errant users to hack the data or information.