Hello Lazarus-List, Tuesday, January 11, 2011, 10:26:44 PM, you wrote:
MML> How about a Capcha that was a coding problem? Everything done by machines (like parsing) is done better by machines :) MML> When I worked for a mainframe company I sat a developer's aptitude test, MML> and one of the questions showed a set of nested functions in a MML> Pascal-derived language with the question being what value does variable MML> A have at point X. I wonder whether that type of problem could be turned MML> out by software, and whether they could be chosen to be difficult enough MML> to defy automated solution but not so difficult as to deter new users? IMHO the "solution" is to personalize the captcha. The most simple captcha is hard to be resolved by a computer if the captcha "style" change everyday. This is not true for large sites like hotmail, yahoo, and others, but for "small" sites a simple image recognition captcha which changes its carrousell everyday is more than secure as specific attack must be designed for low audiente. Using ready packages in forum software is like putting "This is the captcha model xxx, look for computer solution at your local captcha resolver provider" :) OCR is a quite mature technology, so anything based in text is not usefull, computer vision is a different thing, post a photo of a park and ask for the amount of bikes ;) blonde girls, trees, etc... or even better enforce the user to mouse click over the image for each bike. -- Best regards, José -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
