Vitaly Friedman writes "Scientists hope that mind-reading computers will one day replace typed passwords, making fingerprint readers and retina scans obsolete. Skeptics say don't count on it. From the article: 'Researchers at Carleton University in Ottawa, Canada, are exploring the possibility of a biometric security device that will use a person's thoughts to authenticate her or his identity. Their idea of utilizing brain-wave signatures as pass-thoughts is based on the premise that brain waves are unique to each individual. Some researchers believe the difference might just be enough to create a system that allows you to log in with your thoughts.'"
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