Accessible Voice CAPTCHAs for Internet Telephony
Anu Markkola, Janne Lindqvist · 2008
CAPTCHAs have become a pervasive method for protecting against automated submissions to web forums and registration to web based email services. The CAPTCHAs are usually image-based, but voice CAPTCHAs have also emerged as an alternative. In this short note, we discuss our ongoing eorts on designing accessible voice CAPTCHAs for Internet Telephony. We have implemented a testbed for Skype to assess the usability of the approach, and conducted preliminary usability tests with 10 users.