  CAPTCHAs are commonly used to distinguish between human and bot users on the
web. However, despite having various types of CAPTCHAs, there are still
concerns about their security and usability. To address these concerns, we
surveyed over 250 participants from a university campus and Amazon Mechanical
Turk. Our goal was to gather user perceptions regarding the security and
usability of current CAPTCHA implementations. After analyzing the data using
statistical and thematic methods, we found that users struggle to navigate
current CAPTCHA challenges due to increasing difficulty levels. As a result,
they experience frustration, which negatively impacts their user experience.
Additionally, participants expressed concerns about the reliability and
security of these systems. Our findings can offer valuable insights for
creating more secure and user-friendly CAPTCHA technologies.
