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IEEE
2020 IEEE 17th Annual Consumer Communications & Networking Conference (CCNC);2020; ; ;
─accessibility
CAPTCHA
visual impairment
Are CAPTCHAs preventing robotic intrusion or accessibility for impaired users?
Rudy Berton
Ombretta Gaggi
Agnieszka Kolasinska
Claudio Enrico Palazzi
Giacomo Quadrio
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