libcgi-application-plugin-captcha-perl - module providing CAPTCHA support in CGI::Application

Property Value
Distribution Debian 8 (Jessie)
Repository Debian Main amd64
Package name libcgi-application-plugin-captcha-perl
Package version 0.04
Package release 1
Package architecture all
Package type deb
Installed size 66 B
Download size 11.84 KB
Official Mirror
CGI::Application::Plugin::CAPTCHA allows programmers to easily add and
verify CAPTCHAs in their CGI::Application-derived web applications.
A CAPTCHA (or Completely Automated Public Turing Test to Tell Computers
and Humans Apart) is an image with a random string of characters.  A user
must successfully enter the random string in order to submit a form. This
is a simple (yet annoying) procedure for humans to complete, but one that is
significantly more difficult for a form-stuffing script to complete without
having to integrate some sort of OCR.
CAPTCHAs are not a perfect solution.  Any skilled, diligent cracker will
eventually be able to bypass a CAPTCHA, but it should be able to shut down
your average script-kiddie.
When a CAPTCHA is created with this module, raw image data is transmitted
from your web application to the client browser. A cookie containing a
checksum is also transmitted with the image. When the client submits their
form for processing (along with their verification of the random string),
captcha_verify() generates a checksum of the verification string the user
entered. If the newly generated checksum matches the checksum found in the
cookie, the CAPTCHA is assumed to have been successfully entered, and the
user is allowed to continue processing their form.


Package Version Architecture Repository
libcgi-application-plugin-captcha-perl_0.04-1_all.deb 0.04 all Debian Main
libcgi-application-plugin-captcha-perl - - -


Name Value
libcgi-application-perl -
libdata-random-perl -
libgd-securityimage-perl -
perl -


Name Value
libcgi-application-extra-plugin-bundle-perl << 0.5


Type URL
Binary Package libcgi-application-plugin-captcha-perl_0.04-1_all.deb
Source Package libcgi-application-plugin-captcha-perl

Install Howto

  1. Update the package index:
    # sudo apt-get update
  2. Install libcgi-application-plugin-captcha-perl deb package:
    # sudo apt-get install libcgi-application-plugin-captcha-perl




2011-11-10 - Nicholas Bamber <>
libcgi-application-plugin-captcha-perl (0.04-1) unstable; urgency=low
* Split off from
libcgi-application-extra-plugin-bundle-perl (Closes: #646968).

See Also

Package Description
libcgi-application-plugin-config-simple-perl_1.01-1_all.deb module providing Config::Simple support to CGI::Application
libcgi-application-plugin-configauto-perl_1.33-1_all.deb plugin that adds Config::Auto support to CGI::Application
libcgi-application-plugin-dbh-perl_4.04-1_all.deb plugin adding database support to CGI::Application
libcgi-application-plugin-dbiprofile-perl_0.07-1_all.deb plugin providing database profiling support
libcgi-application-plugin-devpopup-perl_1.07-2_all.deb debugging framework for CGI::Application
libcgi-application-plugin-fillinform-perl_1.15-1_all.deb plugin for CGI::Application to fill in forms
libcgi-application-plugin-formstate-perl_0.12-1_all.deb plugin to store form state without hidden fields
libcgi-application-plugin-forward-perl_1.06-1_all.deb plugin to allow one run mode pass control to another
libcgi-application-plugin-json-perl_1.02-1_all.deb plugin to facilitate manipulation of JSON headers
libcgi-application-plugin-linkintegrity-perl_0.06-1_all.deb plugin to make tamper-resisistent links in CGI::Application
libcgi-application-plugin-logdispatch-perl_1.02-1_all.deb plugin that adds Log::Dispatch support to CGI::Application
libcgi-application-plugin-messagestack-perl_0.34-1_all.deb message passing plugin for CGI::Application
libcgi-application-plugin-protectcsrf-perl_1.01-1_all.deb plugin to generate and verify anti-CSRF challenges
libcgi-application-plugin-ratelimit-perl_1.0-2_all.deb Perl module for limiting the runmode call rate per user
libcgi-application-plugin-requiressl-perl_0.04-1_all.deb plugin enforcing that certain run modes must be SSL secured