Enhanced CAPTCHAs : Using animation to tell humans and computers apart - ATHANASOPOULOS, Elias; ANTONATOS, Spiros (Lecture notes in computer science, 2006)
Keywords: Applied sciences; Computer science; control theory; systems; Computer systems and distributed systems. User interface; Exact sciences and technology; Memory and file management (including protection and security); Memory organisation. Data processing; Software; Multimedia; Type theory; Artificial life; Typing; Authentication; Turing machine; Web service; Text; Distributed system; Computer security; Laundry; Computer attack