Authentication (Full Version)

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Bline -> Authentication (7/2/2008 10:01:39 PM) I am a novice without any formal training - I stuggle along managing two web sites for Junior Athletic organizations. Each of these sites have feed back pages on them, that allows the user to generate feedback to members of the organzation. The feedback form sends the required info to the isp which forwards the information in an e-mail to appropriate members of the organization. The spamers are hitting the forms and sending messages about medication and other stuff several times a day. I changed the e-mail address that the isp uses to forward the information but they automatically picked up the new address and sent an e-mail within seconds. I am looking for a solution. I don't know how to do it, but is it possibe to use what I call "Image Authentication" to solve this problem. I see this on many web sites where the web page requires the user to input characters that are generated in an image into an input box and submit to the host for authentiucation. If someone is aware of how to do this, could you please provde me with some code and instuction, Or do you have another idea? Thanks in advace for any assistance Bline

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TexasWebDevelopers -> RE: Authentication (7/3/2008 12:59:33 AM) The finest CAPTCHA program is Microsoft's ASIRRA. See it in action at the bottom of the page, here: http://www.dallasacr.org/Dallas-ACR-Board-of-Directors.aspx You can use this with ASP, .NET, PHP, etc. A CAPTCHA is a small application that is a "Turing test" to see if you are a human or a web bot before submitting a form. Most CAPTCHAS have been "solved" by hackers except this one! The reason has to do with the images used--most CAPTCHA images are too simple and can be easily "read" digitally--others are limited by the number of images in the database of images presented. ASIRRA uses tiny images of cats and dogs that enlarge on mouseover. Make a mistake and the page reloads a new set of images from a set of hundreds of thousands of images on PetFinder.com You can't hack this one...(well, not yet, anyway). and best of all, it's FREE. Follow the help/information link on the example to get the code.

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