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 the word "conundrum" They found that participants' brains react differently to each image, that a computer system was able to identify each volunteer's 'brain print' with 100% accuracy."when you take hundreds of these images ,where every person is going to feel differently about each individual one, then you can be really accu