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May sites have an image control on the registration form. &nbsp;The image presents a blurry image of letters and numbers and protects against robot account creations.<br />
What are these types of controls called? &nbsp;Can you point me towards an example for MVC?<br />
Thank you.
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May sites have an image control on the registration form.  The image presents a blurry image of letters and numbers and protects against robot account creations.
What are these types of controls called?  Can you point me towards an example for MVC?
Thank you.

A security control

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