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• Vorras Antibot
• Visit Demo
• 188
• 1152
• Linux,Windows,Unix,Mac OSX
• N/A
• Free for non-commercial use
• Free
• 1.0
• 21/07/2009
• 21/07/2009
• Vorras Corporation
• http://www.vorras.com/products/antibot/
• image  generation  program 

Description:
Vorras Antibot is an image generation program that prevents automatic form submission by robots. Vorras Antibot generates a random sequence of alphanumeric characters and a picture in PNG format that shows this sequence. It returns the filename of the picture and the sequence in encrypted (hashed) format. The filename and encrypted sequence can then be stored in your HTML form. The user who attempts to fill out the form has to look at the picture and type in the sequence he sees. When the form is submitted the sequence the user typed in is encrypted as well (hashed) and compared to the original sequence. If the sequences match the user passes the test, else it is necessary to re-try.