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Originally Posted by ziycon  Only used the cpatcha image as to stop bots that may crawl the site sending spam and also i've never heard of 'challenge-response'! |
Challange Response is a better form of preventing bots from signing up on forums (IMO). Bots are getting better at reading images but they don't know what "7+5=?" is or "What is the capital of Ireland?"
Take a gander at Ken's -
Simple logic test implemented - Blog, Web design and development news, industry information and cultural musings - TheMenace.com - comment form. If I have a hard time reading the captcha then Bob and his Ma' will as well...
Challange-Response is far more accessible than complex captcha.