cf_image_verify is a quick solution to generate random text image used for verifying human input (Captcha).

Examples:

Features:

• Provide security plug-in for any web form by adding image containing random text. Prevent spam-bot by entering data to your site.
• Create random text as image on-the-fly.
  You can delete the image file soon after user has it loaded to their browser (See viewimage.cfm in the example).
• Fast operation
• Multiple font faces, styles, sizes and colors in one image
• Set distorted image (dotted) level.
  Human friendly: make it possible for human to read it directly without disturbing background.
• Return hashed string.
  You can save the hashed string in session or in the hidden form field. And then check user submitted text against this hashed string.
• Works using CFMX built-in Java. No 3rd party application needed. No CFX tags. Shared hosting friendly.
  Just copy this custom tag in your ColdFusion working directory, and you're set

Application Idea:

This tag provides good security plugin for applications or functions, including (but not limited to):

• Web based forum
• Email service
• Contact page
• Shopping cart
• Blog
• User registration function in all websites
• and many more...

New in V2:
Better error handling. CF_Image_Verify will now throws an error whenever incorrect parameter was supplied.
The caller page can trap the error message in <cftry><cfcatch> block.