Table of Contents:
  • CAPTCHAs and Performance Analysis
  • Building Segmentation Based Human-Friendly Human Interaction Proofs (HIPs)
  • A Highly Legible CAPTCHA That Resists Segmentation Attacks
  • Visual CAPTCHA with Handwritten Image Analysis
  • Characters or Faces: A User Study on Ease of Use for HIPs
  • HIP Architectures
  • Collaborative Filtering CAPTCHAs
  • CAPTCHA Generation as a Web Service
  • Leveraging the CAPTCHA Problem
  • HIPs Within Security Systems
  • How Much Assurance Does a PIN Provide?
  • Phish and HIPs: Human Interactive Proofs to Detect Phishing Attacks.