What Is Image Verification?
A security test to determine whether or not the
user is human. This will ensure that only human visitors will actually
submit the form, and not spamming bots that are browsing the web from
site to site and submit spam where they can. It is well known that
programmers can do programs for many jobs, including visiting a large
amount of sites on the Internet by following links from page to page and
collect emails listed on websites, submit contact forms, or even trying
to break passwords by trying to login over and over again with computer
generated passwords.
Fortunately, it is impossible for a non-human ( ex. computer program
) to extract a word or a combination of letters and numbers from an
image, if the letters and numbers are not all of the same size and of
similar font. This is why, the Image Verification security method
ensures that only people actually can submit a form.
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