Halifax has completed a successful trial of the tech using the wrist band . It reads the wearer 's cardiac rhythm , which is said to be as unique as a person 's fingerprint , to authenticate who they are . Nymi measures the amount of electrical power generated by a human heart . This is called a cardiac rhythm and is tracked on average ( ECG ) ECG varies from person to person and depends on size of their heart . And because it only varies with a single person 's cardiac rhythm it ca n't be hacked if the bracelet is stolen . Makers Bionym said it is more secure than iris and fingerprint scanners .
Halifax has completed a successful trial of the tech using the Nymi band . It reads the wearer 's cardiac rhythm , which is said to be as unique as a person 's fingerprint , to authenticate who they are . Nymi measures the amount of electrical power generated by a human heart . This is called a cardiac rhythm and is tracked on electrocardiogram ( ECG ) ECG differs from person to person and depends on size of their heart . And because it only works with a registered person 's cardiac rhythm it ca n't be hacked if the bracelet is stolen . Makers Bionym said it is more secure than iris and fingerprint scanners .