Stiltwalker, Round 2

Stiltwalker, Round 2

Stiltwalker is a system we designed to break the audio version of reCAPTCHA. At LayerOne, the original stiltwalker was released. However reCAPTCHA updated its system to break stiltwalker in the hours before our talk/release. Prior to these changes, stiltwalker was able to achieve an accuracy of 99.1%. This talk will go over some of the counter-countermeasures we implemented to break the audio version of reCAPTCHA again, the original solving techniques used, and a few other related things we've been working on.

Presented by