November 2011
CAPTCHA Alternatives
by Monique
Below, we take a look at each alternative option, and identify their advantages and drawbacks.
In Search Of The Perfect CAPTCHA - Smashing Coding
by Monique
This article follows the search for the perfect solution to the problem of increasing amounts of human-generated spam. We’ll look at how and why CAPTCHAs are used and their effect on usability in order to answer key questions: what is the perfect CAPTCHA, and are they even desirable?
October 2011
Comment spam protection and CAPTCHA service | Mollom
by Xavier Lacot & 7 others
Mollom is a web service that helps identify content quality and stop spam on blogs, social networks or community websites.
July 2011
June 2011
La mort des CAPTCHA : Comment les pirates arrivent-ils à les casser ?
by Monique
Depuis quelques mois, les techniques d'attaques contre les CAPTCHA se développent. Présentation et explications des différentes techniques utilisées par les pirates...
May 2011
March 2011
February 2011
January 2011
Bypass Captcha : Décembre 2007 - Petit tour d’horizon des techniques pour contourner les captchas
by decembre
décembre 2007 Comment outrepasser / bypasser les codes captchas antispam (en dehors des solutions OCR) ? Le but de passer des captchas est bien sûr le spam de commentaires de blogs, de sites web…, le spam des guestbooks, l’inscription automatique sur des sites web… Il existe 3 façons pour bypasser les codes captchas antispam : 1 – Traitement OCR (Optical Character Recognition) = Reconnaissance optique de caractères. 2 – Faire traiter ces captchas par des internautes à leur insu. 3 – Passer par les failles présentes sur ces captchas (XSS, CSRF, sessions non fermées, captchas en clairs dans code source, captchas encodés en MD5 dans le source, captchas dont les différentes combinaisons sont connues/limitées et donc listables…).
Death to Captchas | TimKadlec.com
by Monique
It’s time to kill off captchas and stop punishing users for trying to interact with our sites.
November 2010
June 2010
slideLock - un système de CAPTCHA alternatif - La Ferme du web
by eledo34 (via)
slideLock est une alternative aux captchas traditionnels pour protéger ses formulaires web.
May 2010
Text Captcha Demo
by Monique
This page showcases CAPTCHA logic question examples. This site provides a web service to generate such questions for use in other sites.
April 2010
March 2010
Address-protector.com - E-Mail Address Protection, That is done using the CAPTCHA
by decembre
Why http://address-protector.com? This server encrypts your e-mail address in a way, that makes it impossible for automatic programs (so called "address harvesters"), to find your clear-text e-mail address on web pages, and to consequently use it for sending you unwanted commercial e-mails (so called SPAM). How is the E-Mail Address protected? To decrypt the e-mail address, the user has to prove being a human and not a machine. That is done using the CAPTCHA service of http://captchas.net.
