Speaker: Richard Chow, PARC
Title: Clickable CAPTCHAs
Abstract:
In the cost-per-click advertising model, clicks from machines are
never desired and potentially fraudulent. While clicks from humans
may also be fraudulent or of low quality, we believe distinguishing
humans from machines would be a large step forward in the fight
against ad fraud. Traditional CAPTCHAs, however, can be annoying and
awkward to use, especially on UI-limited devices such as cell
phones. In this talk, we introduce Clickable CAPTCHAs, which
increase the usability of CAPTCHAs while offering comparable levels
of security. We discuss some applications to ad fraud.