vrCAPTCHA: Exploring CAPTCHA Designs in Virtual Reality

TL;DR

This paper investigates the design and feasibility of traditional and novel VR-specific CAPTCHAs, proposing two 3D interaction-based prototypes and evaluating their usability in a user study.

Contribution

It introduces two new VR-specific CAPTCHA prototypes based on 3D interactions and assesses their feasibility compared to traditional CAPTCHAs in VR environments.

Findings

Two VR-specific CAPTCHA prototypes are feasible for VR use.

Traditional 2D CAPTCHAs can be adapted for VR but may have limitations.

User study indicates potential for VR CAPTCHA design improvements.

Abstract

With the popularity of online access in virtual reality (VR) devices, it will become important to investigate exclusive and interactive CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) designs for VR devices. In this paper, we first present four traditional two-dimensional (2D) CAPTCHAs (i.e., text-based, image-rotated, image-puzzled, and image-selected CAPTCHAs) in VR. Then, based on the three-dimensional (3D) interaction characteristics of VR devices, we propose two vrCAPTCHA design prototypes (i.e., task-driven and bodily motion-based CAPTCHAs). We conducted a user study with six participants for exploring the feasibility of our two vrCAPTCHAs and traditional CAPTCHAs in VR. We believe that our two vrCAPTCHAs can be an inspiration for the further design of CAPTCHAs in VR.