Abstract is missing.
- Building Segmentation Based Human-Friendly Human Interaction Proofs (HIPs)Kumar Chellapilla, Kevin Larson, Patrice Y. Simard, Mary Czerwinski. 1-26 [doi]
- A Highly Legible CAPTCHA That Resists Segmentation AttacksHenry S. Baird, Michael A. Moll, Sui-Yu Wang. 27-41 [doi]
- Visual CAPTCHA with Handwritten Image AnalysisAmalia I. Rusu, Venu Govindaraju. 42-52 [doi]
- Characters or Faces: A User Study on Ease of Use for HIPsYong Rui, Zicheng Liu, Shannon Kallin, Gavin Janke, Cem Paya. 53-65 [doi]
- Collaborative Filtering CAPTCHAsMonica Chew, J. D. Tygar. 66-81 [doi]
- CAPTCHA Generation as a Web ServiceTim Converse. 82-96 [doi]
- Leveraging the CAPTCHA ProblemDaniel P. Lopresti. 97-110 [doi]
- How Much Assurance Does a PIN Provide?Jon Louis Bentley, Colin Mallows. 111-126 [doi]
- Phish and HIPs: Human Interactive Proofs to Detect Phishing AttacksRachna Dhamija, J. D. Tygar. 127-141 [doi]