It uses NeuroSky Mindwave Mobile for brain waves, plus a heart rate monitor, plus a one minute rest period before attempting login.<p>They never tested coercion. &quot;One reason we did not do this is because it is unethical to threaten test subjects in order to verify that our system is fully coercion resistant.&quot; That&#x27;s a problem.<p>Incidentally, names of chemicals, such as dopamine, are not capitalized.