A Logo

Feel free to include my content in your page via my
RSS feed

Help Irongeek.com pay for
bandwidth and research equipment:

Subscribestar or Patreon

Search Irongeek.com:

Irongeek Button
Social-engineer-training Button

Help Irongeek.com pay for bandwidth and research equipment:


dc949 - "Stiltwalker: Round 2" (BSides Las Vegas 2012) (Hacking Illustrated Series InfoSec Tutorial Videos)

dc949 - "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 describe a narrative of the events that lead to us choosing to break the audio version of reCAPTCHA, the methods we used to break it, the events surrounding our LayerOne talk and reCAPTCHA's response, and most importantly how we have worked around their response to break reCAPTCHA again after their changes since LayerOne


Back to BSides Las Vegas 2012 video list

15 most recent posts on Irongeek.com:

If you would like to republish one of the articles from this site on your webpage or print journal please contact IronGeek.

Copyright 2020, IronGeek
Louisville / Kentuckiana Information Security Enthusiast