...................  ......

Safety methods

All biometrics are vulnerable to spoofing by fake copies

• gummy fingerprints in latex
• tape recording of a person's voice
• mask or photograph of a person's face
• contact lens or photograph of a person's iris pattern
  
  
  Some iris cameras can be spoofed
  No biometric pattern should be considered a secret
  So, how can biometric technologies survive this weakness?
  Answer: Liveness Detection Countermeasures

Spoofing a Low-Cost Iris Camera with a Photograph (C't Magazine).