To Captcha or not to Captcha..

by Rob 13. August 2007 20:38

I just saw this article about an invisible captcha on madskristensens' blog. The principle is amazingly simple.

Although it has a small security hole it's rather cool and sufficient for most spambots.

Be the first to rate this post

Currently 0/5 Stars.
1
2
3
4
5

Tags:

Related posts

Large file uploading using Silverlight, ASP.Net and WCF Part 2This is the second part of a multi-part article about implementing large file upload for ASP.Net In ...Large file upload using Silverlight, ASP.Net and WCF, Part 1In this article I would like to show you how I created a reusable ASP.Net component to handle large ...Large file uploading using Silverlight, ASP.Net and WCF Part 3 Welcome to part 3 of my little series of creating an Asp.net component that allows to upload files...

Comments

9/25/2007 12:41:03 AM

It is actually so efficient that I still haven't got a single spam comment since I implemented it 6 months ago.

Mads Kristensen

Powered by BlogEngine.NET 1.4.0.0
Theme by Mads Kristensen

Recent comments

Large file uploading using Silverlight, ASP.Net and WCF Part 2 (1)
Praveen wrote: Good Article. [More]
Large file upload using Silverlight, ASP.Net and WCF, Part 1 (1)
Praveen wrote: Please implement the wcf service. [More]
Repository base classes with LINQ to SQL and performance. (2)
Rob wrote: If you make direct use of the DataContext yourself… [More]
Repository base classes with LINQ to SQL and performance. (2)
Nyla wrote: I don't really understand this. How does this affe… [More]
Life can be simple. (1)
FredAtMIcrosoft wrote: If you want to find out about creating a DNS in Se… [More]
Another pool of entities (2)
Rob wrote: Thanks again, Mark. The idea for nullable types… [More]
Another pool of entities (2)
Markuz wrote: Hey Rob, As a big fan of the EntityPool, I'm ve… [More]
Health Monitoring in ASP.NET 2.0 (2)
Markuz wrote: See also this page for some FAQ(s) http://blogs… [More]
Health Monitoring in ASP.NET 2.0 (2)
Markuz wrote: Hai Rob, Again a good article about some stuff … [More]
Using MSBuild to deploy visual studio 2005 web applications (5)
Rob wrote: If you need info about msbuild, do some googling w… [More]