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What is CAPTCHA? and How Does CAPTCHA Work to Improve Web Security?

Even if you don’t know what a captcha means, it has happened to you that when you have filled out a form on a website, you have come across a combination of letters and numbers that appear in different parts of the website, for example, when paying online. , is shown on the page and asks you to correctly type those letters and numbers in the corresponding box to continue your activity and complete the payment process. But what is a captcha, and how does it help keep the Internet safe? Stay with us to know the answer to this question. In this article, we intend to provide complete explanations of this field.

What is CAPTCHA?

CAPTCHA stands for “Completely Automated Public Turing test to tell Computers and Humans Apart,” which means “Completely Automated Public Turing test to tell Computers and Humans Apart”. Captcha is a security tool to distinguish between human users and bots (usually spammers) and brute force attacks. Captchas are challenges created for users to prove they are real people, not computer programs!

It is good to know that due to the advancement of technology, different methods have been developed for captcha. Typically, captchas work on two main principles:

Image recognition: In this type of captcha, the user must recognize images that contain characters, numbers, or other elements and enter them into a form. Algorithms may generate these images and solvable for the user, but difficult for robots.

Interaction with specified elements: In this type of captcha, the user must interact with specified features in the image, such as the operation of a toggle lock (slider), passing a particular path, or selecting specific images from a collection. These methods are brutal for robots because they require interaction with particular elements.

Why should you use CAPTCHA?

Websites use the captcha to prevent bots and automated software. Many bots and computer programs can automatically fill out forms and submit information, which may lead to misuse and hacking of the site. Captcha is used to prevent these incidents. With a captcha applied, only people who can answer the questions or recognize the images related to the captcha can fill out the forms and submit the information. In other words, a captcha is a security and preventive solution to prevent spam and hacker attacks.

 

Also, using a captcha can help improve the user experience. If a site does not use a captcha to log in to a user account or register, the probability of bots and automated software entering the system will be higher, which may reduce users’ trust in the site.

In addition, the use of captcha is recommended due to the following advantages:

Know the types of CAPTCHA!

CAPTCHA is presented as a test, usually, video or audio, which is easy for human users to solve but difficult for programs and bots. There are many types of captchas, including character recognition, image recognition, interacting with elements specified in the image, answering simple questions, etc. The kinds of captcha are:

These are just a few examples of captcha types, and due to the advancement of technology, other types and followers of captchas are also constantly being developed and improved.

 

Some other types of more advanced captchas are:

How does a captcha help keep the Internet secure?

The primary purpose of a captcha is to distinguish between humans and computer robots. CAPTCHA displays an image or puzzle that is human-readable but difficult or impossible for computer programs. Captcha helps keep the Internet secure by verifying that the user entering the site is a real human being.

In general, captcha as an identity recognition tool is among the tools that help prevent some security attacks, such as spam attacks, and some computer attacks, such as programmed attacks by computer bots and malicious programs that can receive sensitive information. , useful. For this reason, many websites use captcha to keep their users’ data safe.

 

Using a captcha helps keep the Internet secure in several ways:

Uses and uses of captcha

 

Improved user experience: In some cases, captchas may be used as a user interface to interact with users in online systems and improve the user experience. For example, captchas can be an engaging and exciting tool to interact with users in registration processes, password recovery, or filling out forms.
Artificial intelligence test: Captchas can evaluate and test artificial intelligence and machine learning algorithms. The performance and artificial intelligence can be assessed and improved by solving captchas.
Building training data: Captchas can be used to collect and develop training data for machine learning and artificial intelligence algorithms. New clean and labeled data can be generated to train models by solving captchas.
Addressing accessibility issues: Some people have accessibility issues such as blindness, physical disabilities, or hearing problems. Captchas can be used to create accessibility solutions for these people, for example, by providing readable captchas using image, sound, or touch interactions.

But the question may come to your mind is it necessary to use a captcha? In response to this question, it is good to know that using a captcha can be required on some sites. Generally, this mechanism is used to prevent spam attacks, misuse of services, intrusion attempts, and other unauthorized activities. Also, a captcha can provide more secure online interactions and user authentication.

However, captchas may still annoy some users and reduce the user experience. For this reason, some sites use alternative methods such as human-related exercises, straightforward questions, or applying time limits to verify users’ identities instead of captchas.

Ultimately, using a captcha and other security mechanisms for your site depends on your specific security needs and risks and should be decided based on the nature and goals of your site.

How to create a captcha on the site

Creating a captcha on the site can be done in several ways. Below are several standard methods for making captchas:

In general, a captcha is one of the most widely used methods in Internet security. It helps websites and online services to protect against robotic attacks and unauthorized actions and improve the user experience for human users. Therefore, captchas are an effective security tool to prevent unauthorized access to services and websites.

But it should be noted that captchas may also be annoying for human users and affect the user experience, so programmers and web designers should design captchas in such a way as to improve the user experience in addition to security.

 

 

 

 

 

 

 

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