[MODDB] Sortables CAPTCHA Plugin

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Derky
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[MODDB] Sortables CAPTCHA Plugin

Post by Derky » Tue Jul 28, 2009 10:46 am

IMPORTANT:
This MOD has been released into the MODDB
:D



Modification Name: Sortables CAPTCHA Plugin
Author: Derky

Modification Description: This CAPTCHA plugin adds two columns, you can add options to each column. All the options will be displayed into one column, then the user has to sort the options from one to the other column, by dragging them with the mouse. If the options are dragged to the correct columns the CAPTCHA is solved. Because this is a plugin you don't have to edit any file, just upload the files and it works!

This plugin is based on the default Question & Answer CAPTCHA so you can really make it suitable for your type of forum! For example if you have a cooking forum, then you can ask "What to include for tomato soup?"
Image
The user has to drag Bananas and Apples to the Throw away column to solve the CAPTCHA. :-)

Modification Version: 1.0.0-RC1
phpBB Version: 3.0.6

Requirements: Requires at least phpBB 3.0.6-dev

Features:
  • Left and right columns can be renamed to anything
  • Multiple options per column allowed
  • Options are showed in random order
  • Multiple language support
Screenshots:
Tomato soup example ACP:
Image

Michael Jackson albums example ACP:
Image

So you can really customise it to your kind of board. 8-)

Demo: Sortables Test Forum or go directly to the Posting page or Registration page.

Modification Download:
Image See MODDB topic
Last edited by Derky on Sat Sep 26, 2009 8:37 pm, edited 8 times in total.

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Derky
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Re: [DEV] Sortables Lists CAPTCHA Plugin

Post by Derky » Tue Jul 28, 2009 10:48 am

I'm currently working on the front site of it (user registration screen) to display all the answers random and to make the 2 columns where you can drag the options between.

Any feedback so far? :)

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Re: [DEV] Sortables Lists CAPTCHA Plugin

Post by Kellanved » Thu Jul 30, 2009 11:13 am

The idea of using lists is pretty good for a multiple choice captchas. Obviously, any multiple choice captcha is brute-forcible, as the space of possible answers is rather small.
However, using the lists you get a much better problem space using few answers, i.e. with three ingredients you already get 8 (2^3) choices, with four ingredients you get 2^4 etc.
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Derky
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Re: [DEV] Sortables Lists CAPTCHA Plugin

Post by Derky » Thu Jul 30, 2009 11:54 am

Thanks for your reply Kellanved! :)
Kellanved wrote:The idea of using lists is pretty good for a multiple choice captchas. Obviously, any multiple choice captcha is brute-forcible, as the space of possible answers is rather small.
I'm extending the Question&Answer captcha so if the 'answers' are wrong, you will get another question just like the Q&A captcha. So you cannot try every option with a brute force attack.
Kellanved wrote:However, using the lists you get a much better problem space using few answers, i.e. with three ingredients you already get 8 (2^3) choices, with four ingredients you get 2^4 etc.
So for this captcha, forcing a minimum amount of options should be a good idea.

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Re: [BETA] Sortables CAPTCHA Plugin

Post by Derky » Tue Aug 11, 2009 12:38 pm

First beta version is released. I've also added a demo: Sortables Test Forum or go directly to the Posting page or Registration page.

This beta version is fully functional, but it currently doesn't support subsilver2 and users who have JavaScript disabled. Please notice that this plugin will only work on phpBB 3.0.6-dev and higher.

So test it out I would say! I'd love to hear some feedback. :-)

:arrow: Edit: The just released RC version does support users with JavaScript disabled.

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Re: [RC] Sortables CAPTCHA Plugin

Post by svennson » Tue Aug 25, 2009 1:49 pm

Good idea, however not 100%, as random attempts might get in (/brute force) , mainly on automatic posts, as attempts on registration can be limited.
However I like the idea, and some creative minds, might bring the fix for random guessing.

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Re: [RC] Sortables CAPTCHA Plugin

Post by Derky » Wed Aug 26, 2009 9:57 am

More options is the fix for random guessing. By default you have 3 attempts and for every failed attempt you get a new question. So you can't really brute force it because you get an other question every time. :)

/Edit: Released in MODDB:
http://www.phpbb.com/community/viewtopi ... &t=1795925
Last edited by Derky on Sat Oct 03, 2009 1:17 pm, edited 1 time in total.
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