Some idea just came on the training sessions:

1. user don’t need to input any captcha code, user just click on a button;

2. the “button” is a image which looks like a button, but hard to be find out by robots (image can contain invisible noises or backgrounds to make image recognition algorithm really hard to implement) 

3. server generate the position of the button, and verify the position of click to check if it’s in “range”.

–

This method will not need user to enable javascript. I saw a good captcha idea by ask user to simply drag an object to a area with JS.

–

some links in captcha (not related or similar to my ideas so far) :

http://www.eggheadcafe.com/tutorials/aspnet/79e023b6-124f-4f63-865c-6d357cddbe56/a-better-captcha-control.aspx

http://haacked.com/archive/2006/10/02/Better_CAPTCHA_Through_Encryption.aspx

http://haacked.com/archive/2006/09/26/Lightweight_Invisible_CAPTCHA_Validator_Control.aspx

[?]

Share This