CAPTCHA (Completely Automated
Public test to tell Computers and Humans Apart) is a type of test that is
commonly used in this age of modern computing in order to identify if the user
is human or not. It is dependent on the user’s challenge-response. However,
there are instances wherein text based captchas displayed vulnerability from
machine attacks, thus, other forms of captchas were created by researchers.
The most popular alternative to text based
captcha includes image recognition, which is also known as “Visual Captcha”. In
this variation of computer initiated human validation, the user is presented
with varied image options that he/she must correctly identify. Analysts pointed
out that the task of recognizing objects are much more complex than typing
simple texts, therefore visual captcha execution is much more reliable in
withstanding machine learning-based attacks.
Some examples of Visual
Captcha:
More and more businesses are now taking advantage of using
Visual Captcha in their company websites because it promotes better customer
engagement and highly-improved security. This type of captcha can be enhanced
in many ways due to its flexibility in working with different frameworks and
website environments.
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