Fast Food
Functionality
NHUXPA PRESENTS
sponsored by
The CAPTCHA
Completely Automated Public Turing Tests to
Tell Computers and Humans Apart
Why We Use It
CMS Logins
Prevents automated bots from accessing your system
Website Comments
Reduces spam
Why It Sucks
Terrible for Accessibility
"This type of visual and textual verification comes at a huge price to users who are blind, visually impaired or dyslexic. In many cases…CAPTCHAs fail to properly recognize users with disabilities as human."
W3.org
http://www.w3.org/TR/turingtest/
Why It Sucks
Lose Users and Conversions
- Visual CAPTCHAs take 9.8 seconds to complete
- Audio CAPTCHAs take 28.4 seconds to hear and solve
- Audio CAPTCHA has a 50% give-up rate
- Only 71% of the time will 3 users agree on the translation of a CAPTCHA
- Only 31.2% of the time will 3 users agree on the translation of an audio CAPTCHA
http://web.stanford.edu/~jurafsky/burszstein_2010_captcha.pdf
Stanford University Study
Why It Sucks
Easily Bypassed by Attackers
Why It Sucks
Easily Bypassed by Attackers
Today's OCR technology is sophisticated
88% to 100% accuracy
(Even 10% accuracy by a computer amounts to
system failure, just at a slower rate.)
http://www.w3.org/TR/turingtest/
Alternatives
Verified Logins
Twitter, Facebook, Google, LinkedIn, etc.
Alternatives
2-Factor Authentication
Google Authenticator
Alternatives
Clef
Alternatives
Honeypots
Alternatives
Akismet or Disqus
Alternatives
"No CAPTCHA"
Fast Food Functionality
@adamwalter
slides.com/adamwalter/fff
@vital_design
@nhuxpa