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captcha - converting jsp to an image

 
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Hi,

I tried to do Captcha. I call a JSP which generates an image, into another jsp. My problem is I am able to copy that captcha. To avoid this, I have to convert this jsp part to an image. Can anyone help me to solve this issue. Here is my code which I have tried.








Also Please let me know if there are any efficient methods to create captcha other than this.

Thanks in advance.
 
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