The next generation of biometric authentication is already here, moving beyond external biometrics that can be harvested, with ECG (electrocardiogram) authentication.
As an internal biometric, your heartbeat offers inherent security.
An individual’s ECG produces an electric waveform different to another (inter-variability), like a fingerprint. Each heartbeat also forms a different signal (intra-variability). Together, a particular pattern is formed. If an exact match of this pattern is detected, this indicates a spoofing attempt.