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I tried different Java-related captcha solutions such as JCaptcha, SimpleCaptcha, etc. I am not satisfied. I could miss something. What I really like is something very similar to this one in terms of generated characters and look and feel.

http://drupal.org/node/468906

Does anyone know of a Java solution generating an image VERY similar to the above one?

I also tried reCaptcha and don't like it. It often generates capcha code hard for people to type it right in the first try.

Roman C
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curious1
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    Well, people can also keep pressing the refresh button to generate a captcha on reCaptcha they actually like the look of ;) – Chris Dennett Nov 14 '11 at 00:49
  • @ChrisDennett On the occasions when SO mistakes me for a bot, I will generally refresh the gaptcha once or twice before I can make head or tail of it. – Andrew Thompson Nov 14 '11 at 00:52
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    that captcha you want is so weak that it might as well not exist –  Nov 14 '11 at 00:53

1 Answers1

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The type of Captcha you presented has already been cracked. An attacker can pre-process the image, making it thinner, then thicker (eliminating all the little dots), center each character vertically, then run it through a common OCR.

phatfingers
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  • Chris, Andrew, Jarrod, and phatfingers, thank you all so much for sharing your thoughts with me. I may should reconsider my choice of a captcha solution. – curious1 Nov 14 '11 at 01:32
  • Here's an article that can help you evaluate http://elie.im/publication/text-based-Captcha-strengths-and-weaknesses – phatfingers Nov 14 '11 at 18:59