http://netvouz.com/fjordaan/tag/captcha?feed=rss fjordaan's bookmarks tagged "captcha" on Netvouz http://haacked.com/archive/2007/09/11/honeypot-captcha.aspx I was thinking about alternative ways to block comment spam the other day and it occurred to me that there’s potentially a simpler solution than the Invisible Captcha approach I wrote about. fjordaan Thu, 28 Feb 2008 15:47:30 GMT http://www.mperfect.net/aiCaptcha/ fjordaan Sun, 04 Mar 2007 18:30:20 GMT http://spamfizzle.com/CAPTCHA.aspx The following is a design for a CAPTCHA that is likely invulnerable to automated decryption. I originally developed this as part of an anti-spam system that was a very early progenitor of Receiver Initiated Authentication. This CAPTCHA should be particularly invaluable given the recent reports that bots now have as high as a 35% successful attack rate against both the Microsoft and Yahoo CAPTCHA. fjordaan Fri, 01 Aug 2008 09:03:19 GMT http://www.computerworld.com.au/index.php/id;489635775;pp;1;fp;;fpid; CAPTCHA used to be an easy and useful way for Web administrators to authenticate users. Now it's an easy and useful way for malware authors and spammers to do their dirty work. fjordaan Fri, 01 Aug 2008 09:04:19 GMT https://www.livejournal.com/create.bml fjordaan Tue, 20 Apr 2004 20:32:43 GMT http://damienkatz.net/2007/01/negative_captch.html fjordaan Thu, 03 May 2007 19:51:04 GMT http://ha.ckers.org/blog/20070427/solving-captchas-for-cash/ I had a really interesting conversation with a guy out of Romania this morning regarding a team of CAPTCHA solvers that he has set up. The basic premise is that he has 5 guys set up to solve CAPTCHAs like Yahoo, MySpace, and Hotmail. He does this for clients all over the world. fjordaan Wed, 12 Mar 2008 10:46:33 GMT http://video.google.com/videoplay?docid=-8246463980976635143 Google TechTalks July 26, 2006 ABSTRACT Tasks like image recognition are trivial for humans, but continue to challenge even the most sophisticated computer programs. This talk introduces a paradigm for utilizing human processing power to solve problems that computers cannot yet solve. Traditional approaches to solving such problems focus on improving software. I advocate a novel approach: constructively channel human brainpower using computer games. fjordaan Wed, 14 May 2008 08:17:19 GMT http://www.w3.org/TR/2005/NOTE-turingtest-20051123/ fjordaan Mon, 28 Nov 2005 21:02:48 GMT http://www.w3.org/TR/turingtest/#sound fjordaan Tue, 20 Apr 2004 20:32:43 GMT