![](https://www.pdfsearch.io/img/45ff19e1982dc9b227651d71fc6fe65f.jpg) Date: 2018-02-14 16:46:12
| | rtCaptcha: A Real-Time CAPTCHA Based Liveness Detection System Erkam Uzun, Simon Pak Ho Chung, Irfan Essa and Wenke Lee Georgia Institute of Technology , , and wenAdd to Reading ListSource URL: wp.internetsociety.orgDownload Document from Source Website File Size: 4,08 MBShare Document on Facebook
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