The Brave Programmer - Blogging and coding
Not for the faint hearted
 

Blog Posts From The Brave Programmer

Minimize

Don't you just hate captcha - especially when they do not work.

Apr3

Written by:
2009/04/03 08:36 AM RssIcon

Captcha have become a normal part of most websites when it comes to filling in web forms of some sort. THe idea is to stop spam by being able to tell the difference between a human being and a bot or automated program. It does this by asking a question that a normal human being is able to answer. Then a computer grades that answer to determine if you're human or not. All is fine until the thing does not work.

A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:

The term CAPTCHA (for Completely Automated Turing Test To Tell Computers and Humans Apart) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas Hopper and John Langford of Carnegie Mellon University. At the time, they developed the first CAPTCHA to be used by Yahoo.

Some of the uses of captcha are:

  • Preventing Comment Spam in Blogs.
  • Protecting Website Registration.
  • Online Polls.
  • Preventing Dictionary Attacks.
  • Search Engine Bots.
  • Email Worms and Spam.

This is all great, but when you get to a website where you have to fill in the captcha, and it does not work, then it is very frustrating. I have been to numerous websites these last two months where the capture clearly has a problem. When you double check you answer, when you get someone else to double check your answer, and clearly the answer is correct, but when you submit the form you are presented with the error message: The security code you entered did not match.

Frustrating. frustrating. frustrating, is all I can say. I have just recently filled in a web e-mail form asking a question on a site that is important to me, but cant get it through. On this particular persons site, there is not other form of contact, so I cant even tell him that his web form and capture are not working.

This blog uses captcha, I sure hope it works. If not why don't you email me at "robert at integralwebsolutions.co.za" (purposely done so that spam bots do not pick up on the email address).

Have you ever been frustrated at a captcha that clearly does not work?

Tags:
Categories:
blog comments powered by Disqus

6 comment(s) so far...


Gravatar

There are alternatives

Robert,
At least you're thinking about the potential frustrations of your site visitors, unlike most who apparently go grab the most used one out there without doing their homework on the effect it's going to have. I've had several people tell me that their site visitors fail 1 in every 5 times on their reCAPTCHA, and another Web 2.0 entrepeneur tell me he's calculated that he loses 1 in every 12 potential site registrations because of the frustrations that reCAPTCHA being on their site causes. So many of the big sites have engineers who see this kind of data, but for some reason they don't think they have any alternative but to let their visitors continue to fail so often and be frustrated or defect as a result.

That's why we came up with VidoopCAPTCHA - to make things easier on real people but still stop the spambots. Check out the demo with the 3 different ways it can be displayed and let us know what you think.

http://demo.vidoop.com/captcha

-Troy

By Troy on  2009/04/03 07:06 PM
Gravatar

Re: Don't you just hate captcha - especially when they do not work.

Troy,

Thanks so much for this info. I am on my way to have a look. I am sure others will benefit as well.

By Robert Bravery on  2009/04/03 07:06 PM
Gravatar

Re: Don't you just hate captcha - especially when they do not work.

I know many people with vision impairment who simply cannot use web sites that require captcha codes.

I've had no problems with Blogger (their captcha codes are big enough to be readable, and still effective - though sometimes they form "almost-words" or "near-phrases" that are so funny as to be almost blog-worthy). I use js-kit and Commentluv on my blog, and have had only two or three comments from spammers - the kind that fly by, leave a halfway relevant comment, and a link to a site that's just one big ad. I don't think the bots are getting through, but js-kit uses Akismet, too.

By Holly on  2009/04/26 08:23 AM
Gravatar

Re: Don't you just hate captcha - especially when they do not work.

I realise that it is not a perfect solution, I don't see one out there. But I think I will have a look at your suggestion of js-kit.

Maybe I just have that face that attracts spammers

Thanks

By Robert Bravery on  2009/04/26 08:29 AM
Gravatar

Re: Don't you just hate captcha - especially when they do not work.

I realise that it is not a perfect solution, I don't see one out there. But I think I will have a look at your suggestion of js-kit.

Maybe I just have that face that attracts spammers

Thanks

By Robert Bravery on  2009/04/26 01:50 PM
Gravatar

Re: Don't you just hate captcha - especially when they do not work.

Man what's going on here, Seems like there is double comment posting from me. My apologies, it is not me I promise

By Robert Bravery on  2009/04/26 01:55 PM
 
Blog Updates Via E-mail
 Blog Updates Via E-mail
Minimize

Do you want to receive blog updates via e-mail. Then just click on the link below. You will be redirected to Google's feed burner, where you can fill out a form. Supplying your e-mail address.

The subscription is managed entirely by Google's Feedburner. We cannot and do not collect your email address.

Subscribe to The Brave Programmer by Email

Print  
 

 

Latest Comments
 Latest Comments
Minimize
Powered by Disqus

Sign up with Disqus to enjoy a  surprise box of features

Print  
 
Blog Roll
 Blog Roll
Minimize
Print  
 
Categories
 Categories
Minimize
Print  
 
<h1>Search Blogs From The Brave Programmer</h1>
 

Search Blogs From The Brave Programmer

Minimize
Print  
 
Archive
 Archive
Minimize
Archive
<September 2017>
SunMonTueWedThuFriSat
272829303112
3456789
10111213141516
17181920212223
24252627282930
1234567
Monthly
Go
Print  
 
<h1>News Feeds (RSS)</h1>
 

News Feeds (RSS)

Minimize
Print  
 

Follow robertbravery on Twitter

Blog Engage Blog Forum and Blogging Community, Free Blog Submissions and Blog Traffic, Blog Directory, Article Submissions, Blog Traffic

View Robert Bravery's profile on LinkedIn

Mybyte

 

Robert - Find me on Bloggers.com

Tags
 Tags
Minimize
Print  
 
Contact Us Now
 Contact Us Now
Minimize
 

Email  us now or call us on 082-413-1420,  to host your website.

We design and develop websites. We develop websites that make a difference. We do Dotnetnuke Module development.

Web Masters Around The World
Power By Ringsurf
Print