My boss has asked me to add a feature to our webform that forces the user to enter the word located in 'encrypted image'. You see this a lot all over the web in order to stop programs/people from automatically submitting their forms (using Mechanize or whatever). Once a user correctly enters the 'word' in the image with the form, the form submission is accepted and processed by the program.
Does anyone know where I can find information on how to implement this? Where do i get the images? Has anyone else done this?
In reply to Image encryption? by Anonymous Monk
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