Scientists have developed a system that can identify the people using their brain waves or 'brain print' with 100% accuracy , an advance that may be useful in high security applications . Researchers at Binghamton University in the in the US recorded brain activity of 50 people wearing a electro-encephalogram(EEG) headset while they looked at a series of 500 images designed specifically to elicit unique responses from person to person -for example a slice of pizza ,a boat,or ...