On the necessity of user-friendly CAPTCHA.

Christos Fidas Artemios G. Voyiatzis Nikolaos M. Avouris

Published in: CHI (2011)

Keyphrases

user friendly
back end
highly interactive
graphical user interface
graphical interface
user interface
online databases
user friendly interface
database
software package
command line
user authentication
senior citizens
databases
machine learning
operating system