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A Novel Attack on Monochrome and Greyscale Devanagari CAPTCHAs.
Mohinder Kumar
Manish Kumar Jindal
Munish Kumar
Published in:
ACM Trans. Asian Low Resour. Lang. Inf. Process. (2021)
Keyphrases
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recognition scheme
word recognition
color images
attack detection
computer programs
character recognition
countermeasures
secret key
spatial resolution
malicious attacks
key exchange protocol
data sets
handwritten numerals
detection mechanism
block cipher
ddos attacks
colour images
black and white
document analysis