Re: 3 mins of your time please...logic problem
| From: | SLanger at spirit21 dot de | Date: | Thu, 25 Sep 2003 08:48:24 +0000 |
| Subject: | Re: 3 mins of your time please...logic problem | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-163871@lists.php.net to get a copy of this message | ||
A different approache for the captcha.. instead of using a blurred image
use some text and than ask a question about the text like
What does the 2nd word in the first line of the 4thparagraph say?
Things to make sure:
- Use enough texts so that guessing the correct word is not possible.
- Use random word extraction to make the word different on each
invocation.
- Use different questions types and mix numbers and words. Like what is
the word after the first word... stuff like that 10 different question
should suffice
- make sure that you have a timeout or relocation after a wrong word to
make brute force attacks unattractive or even impossible
This should be fairly easy to implement using db and php and is not quite
as complicated as creating a blurry image. (IMHO) The system is easy to
extend and easy to use by humans.
Regards
Stefan Langer