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A Simple Generic Attack on Text Captchas.
Haichang Gao
Jeff Yan
Fang Cao
Zhengya Zhang
Lei Lei
Mengyun Tang
Ping Zhang
Xin Zhou
Xuqin Wang
Jiawei Li
Published in:
NDSS (2016)
Keyphrases
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information retrieval
database
countermeasures
machine learning
multimedia
web documents
textual data
attack detection