Security Enhancement via Images
April 13, 2008To have a better security over your website form, especially on the email forms, you may include security code via Images feature where the user is required to enter the security code shown in the images before they can submit the data.
This will be more secure using image than you just provide security code in string format, users with a little knowledge about programming can easily extract the security codes from the html output.
This security code can be easily coded in PHP scripts using GD Library and PHP Session. To have a better understanding, click here to download the sample script. I have split out my sample script into 3 main files:
1. image.php >> Generate random security codes and output the code in image format
2. index.php >> provide a simple form for user to enter the security code by referring to image.php output
3. process_code >> validate the security codes entered by user.
July 15th, 2010 at 10:31 pm
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