Assignment .

Facial geometry
Fingerprint
Hand and palm print
Hand geometry
Iris recognition
Retinal recognition
Signature recognition
Voice recognition

For each of the above, locate a vendor that provides a product designed to examine that feature. Provide the name of the vendor, the name of the product, the URL, and the Cross-over Error Rate (CER) associated with the product if you can find it.  If you cannot find some of the requested information, please indicate that. Of those in the list, which do you believe is more acceptable to users and why?  Which would be preferred by security administrators and why? What happens if they are not the same?