Disclamer
We speak…
fr-FR
fr-CA
With that in mind, feel free to interrupt us at any time.
Speaker
Vincent Vince François
- General Manager of Coopérative AccessibilitéWeb (2009)
- Certified expert in Web accessibility (2005)
- Engineer (1990)
Speaker
Samuel Sam Sirois
CAPTCHA
- CAPTCHA
- Completely Automated Public Turing test to tell Computers and Humans Apart.
History
- Year 1991, Web goes public,
- Year 1993, first Web bot,
- Year 1995, first Web application,
- Year 2000, first CAPTCHA.
Spears and shields: duck and cover!
Rules
- Half the room as human being, deeply trying to live our lives;
- Half the room as evil bots, destroying computer scientists efforts;
- Us, as computer scientists, deeply searching to prevent robots from consuming there resources will propose you defence systems and we will debate a minute or two on each suggestions in order to find out if the bots are able to pass through our defence system and if the system blocks a set of human from accessing the protected functionality…
- Have fun and explore cool ideas!
CAPTCHA? What for?
- Disallow robots from accessing a service or a publication
- Stop robots’ unwanted content (SPAM)
- Reduce resource cost or money spent on manually removing SPAM
- Make sure that sensible data mining by robots is not possible
- …
CAPTCHA, How Does it Work?
By asking the user to:
- perform a simple task,
- that a program wouldn’t be able to accomplish
- in order to authenticate the humanity of the user and authorize him automatically by recognizing the success of the task.
Accessibility Problem: Perception
- Insufficient colour contrast,
- Insufficient sound contrast,
- Unavailable alternative texts.
Accessibility Problem: Usability
Sabotage
Accessibility Problem: Comprehension
Temporary Dyslexia
Accessibility Problem: Robustness
Talking of interoperability with all user-agents?
Accessible Solution, an attempt with DISTCHA
- History
- Formal definition
- DISTCHA
- Device Independent Slider Test to tell Computers and Humans Apart.
Web Experience Toolkit (WET) includes ready-made tools and solutions for building and maintaining innovative Web sites that are accessible, usable, and interoperable. These tools and solutions are open source software and free for use by departments and external Web communities.
DISTCHA’s objectives
- Accessible interface
- Secure system
What is a secure system?
How?
- Accessible Interface
- Perceivable
- Usable
- Understandable
- Robust
- Secure System
A walk-through DISTCHA's integration
HTML
<form method="post" action="reverse-turing-test.php">
<fieldset>
<input type="hidden" value="0" name="distchaValue" id="distchaValue">
<div class="field">
<label for="distchaID">
Please, move the slider cursor all the way through to 100%.
</label>
<div class="distchaContainer">
<input type="button" value="Slide me!"
id="distchaID"
class="cursor draggable"
/>
</div>
</div>
</fieldset>
<div class="controls">
<input type="submit" value="Submit" name="submit" id="submit">
</div>
</form>
Javascript
<script type="text/javascript">
/* <![CDATA[ */
var params = {
distcha: {}
};
PE.progress(params);
/* ]]> */
</script>
Download WET features.
WAI-ARIA
<input type="button" value="Slide me!"
class="cursor draggable ui-draggable" id="captcha"
style="position: relative;"
aria-valuetext="0 percent."
aria-valuenow="0"
aria-valuemin="0"
aria-valuemax="100"
role="slider"
>
Where are we now?
Accessibility efforts
- Basic experience
- High contrast interoperability
- Keyboard instruction
Explorations
- We explore the idea of calculating the delta of time between two points on the x axes.
- We explore if a behaviour analysis of keystrokes and mouse movement is relevant.
- We explore the proof of work concept.
- We explore a couple of little ideas and see where it goes.
Conclusion
- Spears and shields
- Trendy effect
- In robot’s land,
Human, your ID!
Questions
Questions?, Comments?, Suggestions?, Objections?
