Image via Wikipedia Paradoxically, one of the necessary ways to fight identify theft is to share information about yourself. This is necessary because you can’t prevent someone from pretending to be you unless the person you are communicating with has some information about you.
Using one’s intrinsic physical and behavioral traits to prove your identity is called Biometrics.
An interesting question that Ori Pessach brought up recently was, “What do you do when your physical traits is compromised?” If someone can reproduce your fingerprint (which is very difficult, but not impossible), how do you replace it?
In all practicality, using several different methods simultanously to identify a person greatly strengthens the proof that the person is who they say they are. Just make sure at least one if not two of these methods can be changed!
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