Text-based CAPTCHA strengths and weaknesses.

Elie Bursztein Matthieu Martin John C. Mitchell

Published in: CCS (2011)

Keyphrases

strengths and weaknesses
advantages and disadvantages
relative strengths and weaknesses
neural network
multimedia
visual features
image search
user authentication
usability testing
learning algorithm
data sets
machine learning
knowledge base
database
human computer interaction
semantic information