Some applications

• A combination of factors that differentiate one person from another leads to authentication

  • Physiological differences (e.g., response times)
  • Trained response differences (e.g., flash and hit)
  • Cognitive perceptual differences (e.g., color blind)
  • Contextual perceptual differences (e.g., situational)
  • Cultural biases (e.g., meaning of select phrases)

• Different schemes for different contexts

  • Initial / Periodic / Random / On Demand
  • Different surety levels

Notes: