A Survey of Research on CAPTCHA Designing and Breaking Techniques.

Yang Zhang Haichang Gao Ge Pei Sainan Luo Guoqin Chang Nuo Cheng

Published in: TrustCom/BigDataSE (2019)

Keyphrases

artificial neural networks
hidden markov models
computational intelligence
information retrieval
artificial intelligence
knowledge base
data streams
data analysis