biometric security

i found very interesting what i learned about the biometric security and how a machine can scan and take information from our biological system in order to protect or to secure something else. I know the US government uses this kind of security in many things. a simple example is the way the use is with the immigrants and with the people who enters the country, i know this because when i when to issue my visa, the first thing the people in the embassy did, was to take my finger, hand prints, a picture of my face a a scan of my eyes. I found interesting also some way to avoid this biometric security systems like the one used by government in other areas. your driver's license contains biometric information about you. Your height, weight, hair color and eye color are all physical characteristics that can easily be checked. However, your height changes with age (16 year old drivers get taller, senior citizens get shorter). Your hair color changes naturally (and on purpose). You can wear colored contact lenses that change your eye color; everyone's weight fluctuates over time.


here are some nice links about this topic: http://www.youtube.com/watch?v=CL3Mjn7uAnA


http://www.youtube.com/watch?v=s8ghfI1LL9Y&feature=related     this one is good!!!!

http://www.youtube.com/user/video4aoptix?feature=pyv&ad=5356037084&kw=biometric%20security#p/u/0/kEURCYlg2aQ