Rails Captcha demo

| simple-captcha | reCaptcha | BrainBuster |
Blog post with additional notes and comments

These examples are display only

(submitting an entry won't show you the validation logic)

Listing users

Name	Email
test	foo@bar.com	Show	Edit demonstrates google's recaptcha	Destroy
test	foo@bar.com	Show	Edit demonstrates google's recaptcha	Destroy
test	foo@bar.com	Show	Edit demonstrates google's recaptcha	Destroy
foo	foo@bar.com	Show	Edit demonstrates google's recaptcha	Destroy
		Show	Edit demonstrates google's recaptcha	Destroy
a	a	Show	Edit demonstrates google's recaptcha	Destroy
sivakami	sivabonnybliss.com	Show	Edit demonstrates google's recaptcha	Destroy
foobar	foo@bar.com	Show	Edit demonstrates google's recaptcha	Destroy

Simple-Captcha Example

Using settings described at http://expressica.com/simple_captcha simple-captcha

requires db:migrate to persist the keyed answer
requires rmagick to create the image
works well, easy enough to change

click to change the current config
show_simple_captcha({:image_style=>"simply_red", :distortion=>"high"})
show_simple_captcha({:image_style=>"random", :distortion=>"medium"})
show_simple_captcha({:image_style=>"random", :distortion=>"high", :code_type=>"numeric"})

Using {:image_style=>"simply_red", :distortion=>"high"}

(type the code from the image)

go to the new user page to actually use simple-captcha New user

reCaptcha Example

google's recaptcha

commonly used
requires outbound http call, (may have to deal with proxies)
handles ssl
can play audio if text is too hard
requires 2 text inputs
expects rails 2.3.8, html_safe, had to monkey patch a do nothing method
has styling options, but I had problems getting it to look right in the form I was using (moving it outside my fieldset made it look fine, so its just a matter of figuring out what crazy style was going on there)

Edit a user to see it in action click the audio button to hear how that works

BrainBuster Example

try BrainBuster captcha on the New post page

doesn't make 3rd party outbound call
doesn't require rmagick
does require a db table to store a set of questions
presents the user with a set of logic questions
by default uses cookies to flag that a user has answered successfully, but that can be turned off to always challenge
when a question uses words for numbers handles numeric to text conversion (five vs. 5) as in
what is ten divided by two?

BrainBuster uses a simple logic question that many users find less intimidating than the standard distorted image.
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