1.   Among those are biometric devices like iris-recognition systems and retinal scanners, which require people entering a secure area to submit their faces for electronic scanning.

2.   During the past year, banks have experimented with retinal scanners, voice-recognition devices and other security technologies.

3.   High-technology companies from Israel are trying to interest American partners in data-protection technologies and biometric security devices like retinal scanners and facial-recognition systems.

4.   The exhibition has the latest security technology, including a retinal scanner used to identify people by scanning their eyes.