CAPTCHAs Don’t Work Anymore

March 12, 2008

In a blog post last month, Distinguished Professor and Dean of
Computing Richard DeMillo described CAPTCHAs, the distorted text used
as a security test to thwart Spammers and other Web site abuse, as “a
leaking levee facing a hundred-year storm.”  Now ABC News reports that
Spam originating from Google's Gmail domain doubled last month,
indicating that spammers are still defeating the CAPTCHA (Completely
Automated Public Turing test to tell Computers and Humans Apart).
“Internet security in general is a cat and mouse game, with security
systems and professionals trying to stay a step ahead of the black
hats. But staying ahead with CAPTCHAs is tricky and may be impossible,”
DeMillo said.

Read Rich DeMillo's full discussion on CAPTCHA here.

Read the ABC News item "Crafty Spam Outsmarts Gmail's Filters" here.