Flatulent-0.0.1 ascii captcha for the masses

NAME

flatulent : CAPTCHA for FIGLET.

SYNOPSIS

the flatulent gem provides brain dead simple ascii art captcha for
ruby.

URI

http://codeforpeople.com/lib/ruby
http://rubyforge.org/projects/codeforpeople

INSTALL

gem install flatulent

EXAMPLE

def index
if params.has_key? ‘flatulent’
Flatulent.validate! params
end

 render :inline => <<-html
   <html><body>

     #{ Flatulent.form }

   </body></html>
 html

end

DOCS

see source in lib/*
see example rails project in ./rails

ONLINE SAMPLES

http://drawohara.tumblr.com/post/4791838

enjoy

ps.

sorry for double post - dropped subject on the last one!

-a

There’s no use in the “noise” unless it’s made of the same ascii
characters as the letters.

But then again, ascii art captchas are severely broken and there’s
nothing simple to do about it.

Aur

On Jul 2, 2007, at 11:15 PM, SonOfLilit wrote:

There’s no use in the “noise” unless it’s made of the same ascii
characters as the letters.

the new version uses that and blowfish encoded key

But then again, ascii art captchas are severely broken and there’s
nothing simple to do about it.

all captchas are broken and most are also complicated. nevertheless,
they are extremely effective. i’m curious why you think ascii art
captchas are more broken than any other?

kind regards.

-a

On Jul 3, 2007, at 1:39 AM, ara.t.howard wrote:

nothing simple to do about it.
being better. simply reflect on that.
h.h. the 14th dalai lama

Beautiful! another way to do human validation on user entries online!!!

With so little grid cells and so little possible transformations,
pattern matching is much much simpler.

Aur

On Jul 3, 2007, at 8:49 AM, SonOfLilit wrote:

With so little grid cells and so little possible transformations,
pattern matching is much much simpler.

exactly which ‘grid’ are you referring to? there is no grid and
there are no ‘word’ chars in the virutal grid. have you looked at
the source? check out my response to brian.

also, i’m not so sure that that it true: a modest sized ascii
captcha has around 40960000 simple combinations. the current source
uses an encoded timestamp which must be submitted with the captcha
else it’s invalid. that timestamp is only valid for a few minutes
and that means a program would have to make around 20480000 posts (on
average) to the same website within a few minutes to crack it using
brute force. this seems highly unlikely to me.

(ps. neither the timestamp not key are encode in the first release,
but the repo one has this feature)

the direction i’m heading is to have all virtual grid cells
positioned via css. which means the only real way to construct a
grid is to using a rendering engine first, and then to ocr the
clipped image. i’m very confident that

a) this can be done
b) it’s even more work than traditional captcha to decode
c) it’s 100 times less work for web developers

i’m truly very interested in seeing if someone can actually crack
this (i’m sure that they can) with a reasonable amount of effort.
remembering that traditional captcha can be broken with a low-medium
amount of effort yet reduces spam by around 98%.

kind regards.

-a

On Jul 3, 2007, at 12:17 PM, ara.t.howard wrote:

i’m truly very interested in seeing if someone can actually crack
this (i’m sure that they can) with a reasonable amount of effort.
remembering that traditional captcha can be broken with a low-
medium amount of effort yet reduces spam by around 98%.

I wonder how solid efforts like this old Ruby Q. are:

http://www.rubyquiz.com/quiz48.html

James Edward G. II

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