What do *you* think? Can you post some of the advantages and disadvantages of such a system? How much of such a system is in use right now for security access for different parts of an airport and aircraft?
I think those are both good cons. I'd add that you probably need mechanical backups for those biometric devices, since power can be lost (and backup batteries can go dead), and you still may need access to those areas under those conditions.1 Cost for the airlines carrier fixing the Biometric devices in the strategic locations of the commercial aircraft.
2 Security of the device if tampered could be a bottleneck as somebody may misuse this.
There have been some amusing (and sometimes not so amusing) instances where voice recognition software failed because the person trying to speak was extremely stressed about something. Not a good time to lock the pilot out of the cockpit, just because his/her voice is a pitch higher as the plane is going down...A biometric device is a security identification and authentication device. Such devices use automated methods of verifying or recognising the identity of a living person based on a physiological or behavioral characteristic. These characteristics include fingerprints, facial images, iris and voice recognition.