Other posters point out that polygraphs have large error rates and that even the thought that they can 'read you mind' acts as a deterrent. In general, reading one's own mind is somewhat difficult given a stressful situation, let alone reading another's.
Yes, you can do heart rate stuff, but many medications affect that tremendously, you can do temperature stuff via IR video, but that is also super error prone. Just running to grab your flight, a perfectly reasonable thing to do at an airport, would trip every alarm in the building. Your gait would be off, your temperature, heart rate, blood pressure, eye dilation.
The issue is that humans come in an incredible array and variety of conditions. Even if you could take a baseline for every person that would ever want to fly before they got to the airport in a sterile room, the data would be useless by flight #10. This is leaving aside the tremendous human rights issues, engineering, and cost factors.
That said, computers are getting better and better at this every day, so the feasibility is there, it is just that you have to do tracking on an unheard of scale and on a day to day running basis across every single person on the planet. The disease and medical applications are the way to get it 'passed' (whatever governing body that may be), not the TSA.
Yes, you can do heart rate stuff, but many medications affect that tremendously, you can do temperature stuff via IR video, but that is also super error prone. Just running to grab your flight, a perfectly reasonable thing to do at an airport, would trip every alarm in the building. Your gait would be off, your temperature, heart rate, blood pressure, eye dilation.
The issue is that humans come in an incredible array and variety of conditions. Even if you could take a baseline for every person that would ever want to fly before they got to the airport in a sterile room, the data would be useless by flight #10. This is leaving aside the tremendous human rights issues, engineering, and cost factors.
That said, computers are getting better and better at this every day, so the feasibility is there, it is just that you have to do tracking on an unheard of scale and on a day to day running basis across every single person on the planet. The disease and medical applications are the way to get it 'passed' (whatever governing body that may be), not the TSA.