[MODDB] Sortables CAPTCHA Plugin

[Derky]

IMPORTANT:
This MOD has been released into the MODDB



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?"

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:


Michael Jackson albums example ACP:


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

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

Modification Download:
See MODDB topic

[Derky]

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?

[Kellanved]

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.

[Derky]

Thanks for your reply Kellanved!

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.

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.

[Derky]

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.

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

[svennson]

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.

[Derky]

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