What is it about?
Are you looking for a fun and user-friendly CAPTCHA for small screens? We propose SenCAPTCHA, a mobile-first CAPTCHA that leverages the mobile device's orientation sensors. SenCAPTCHA works by showing users an image of an animal and asking them to tilt their device to guide a red ball into the center of that animal's eye. Our usability studies show that SenCAPTCHA is viewed as an "enjoyable" CAPTCHA and that it is preferred by over half of the participants to other existing CAPTCHA systems.
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Photo by Mia Baker on Unsplash
Why is it important?
SenCAPTCHA uses the built-in orientation sensor to compensate for limited screen space, offering a natural, novel, and efficient user experience for mobile devices. By adopting a more game-like approach, we reduce the burden of completing SenCAPTCHA. According to the feedback from 202 participants, SenCAPTCHA achieved higher usability and lower average completion time than text-based, audio-based, image-based, and video-based CAPTCHAs.
Perspectives
When evaluating SenCAPTCHA, I found it pretty hard to find a large CAPTCHA instance pool for different CAPTCHA systems. Therefore, we publish the source code of the text-based, audio-based, image-based, and video-based CAPTCHAs used in our studies at www.sencaptcha.org. I hope it will benefit the whole CAPTCHA research community.
Yunhe Feng
University of Tennessee
Read the Original
This page is a summary of: SenCAPTCHA, Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies, June 2020, ACM (Association for Computing Machinery),
DOI: 10.1145/3397312.
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