Your Thoughts Are Your Password
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.'"
This "thought password" is just another biometric, except one which even the actual owner can't be certain he can reproduce at will. If a sensor can non-invasively read your brain activity to open the door, then another sensor can non-invasively read your brain activity to try to reproduce the signature by fraud. It may or may not turn out to be easy to train a bunch of random lab biomass to reproduce a particular "thought." Lastly, a password is something that can be lent to authorized parties or bequeathed when you're no longer around. A biometric in general cannot. In some circumstances, this can be a good thing or a problem. A lawyer or boss can be the "executor" in your absense, but some situations are best when there is no proxy or executor middleman.
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I'd love it if my computer wouldn't let me unlock it to write drunken e-mail at three AM.
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