A survey of CAPTCHA technologies to distinguish between human and computer
Xin Xu, Lei Liu, Bo Li
Topics & Concepts
CAPTCHATuring testUsabilityComputer scienceTuringMechanism (biology)Computer securityHuman–computer interactionArtificial intelligencePhilosophyEpistemologyProgramming languageUser Authentication and Security SystemsAdvanced Malware Detection TechniquesSpam and Phishing Detection