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