All of us web users have tri several times in different ways to prove that we are not robots. Usually, at the time of entering or registering on a site, we are fac with images that we are ask to select and confirm: fire hydrant, motorcycle, school bus, palm tree, traffic light, pestrian lane and such images. Let’s say we are human. Or even performing a simple math operation, typing a number or random and distort letters and a simple click on a box is a type of validation, which is generally call captcha. While performing these tests, you may have notic the word CAPTCHA and ask yourself how it leads to increas site security.
What is captcha?
CAPTCHA, which stands for Completely Automat Public Turing test to tell Computers and Humans Apart, is consider an effective method to distinguish between computers and humans. It is important and necessary to use CAPTCHA when designing a website to ensure the security of the website. In its older models, users have to recognize certain letters and characters that are display in an image in the form of hashed and twist. The robot cannot recognize this type of text. If the enter character does not match the image, users are test again and the human identity test is repeate. These tests are mainly used in survey forms, user account registration and bank payment portals.
But over time, more advanc robots equipp with these types of character recognition systems and conventional captcha tests lost a large part of their efficiency. For this purpose, Google creat the reCAPTCHA technology to distinguish between real users and bots, which we discuss in detail in a separate section.
How does captcha work?
Captcha is one of the ways to manage the activity of robots, and to prevent the entry and damage of malicious robots, they are developed in the form of code and depend on the ability of humans to detect them. These codes need to be programmed once, and after that, they automatically identify users in random tests and distinguish them from robots. Initially, it was design to prevent spam bots from writing multiple comments. Because each robot can post hundres of comments on different sites every minute. Since most bots and computer software do not have the ability to understand and recognize jumbled letters, captcha was used. But a human user can understand all kinds of fonts and colors and it is easy for him to recognize numbers and letters.
Types of reCAPTCHA models
Today, reCHAPTCHA is used in several different types on sites, the most common of which are image recognition, jumbled numbers and letters, solving simple mathematical equations, word recognition, “I’m not a robot” checkbox, and general evaluations of user behavior. , pointed out that three versions of reCAPTCHA have been developed and used over time. In the following, we will examine each of them separately.
Telemarketing data all databases are vital buy telemarketing data for companies that want to reach out to all their marketing and databases accordingly. By developing self-discipline, you can strengthen your organization and achieve even the most challenging goals. Where modern industry is prioritized over other marketplaces or organizations.
Stay with us
Thank you
reCHAPTCHA recognize images
In the image recognition mode, the user usually sees 9 or 16 square-shaped images side by side, which are of several types. For example, see 9 thumbnails of a larger photo. Or, each photo may be different from the other and the user must recognize a specified pattern and the desired test. For example, select photos that include cats or other animals, traffic signs, trees, vehicles, and any other subject and verify. Sometime wrong images may be selecte, which Google’s artificial intelligence considers this possibility of error and compares the user’s answer with the majority of other users who have done the test with the same images and authenticates it. The most advanced computers with artificial intelligence capabilities are not able to recognize such algorithms in images, and only humans are able to perform this test due to their interaction and familiarity with these images.
reCHAPTCHA Solve a simple math equation
Although doing an addition and subtraction seems like a very simple equation, solving them is very difficult for robots and they cannot handle it.
reCHAPTCHA word recognition
Text recaptchas are similar to the traditional captcha method to recognize the user’s identity, which consists of a number of cross out letters and numbers that must be enterin the corresponding box. With the difference that for people who have vision problems, it is possible to hear characters and change words. But still, as before, its structure is understandable for many intelligent and advanced robots, and this is the main weakness of this model.
Checkbox
This is the easiest way for the user to prove his human identity to Google and reCHAPTCHA user services. Usually, all of us have come across an image that says “I’m not a robot” and by clicking on its box, we have entered the desire site or service. But the working mechanism and its process are not limite to a simple click or touch in the specifie box; Rather, it examines all behaviors that lead to clicks and ticks. In the method of clicking on the select box, ReCHAPTCH checks the movement and displacement of the user’s mouse pointer and its approach to the desir box. Even the most precise human behavior is accompanied by some micro-level random motion.
reCHAPTCHA by evaluating general user behavior
This model is one of the latest why uninstalling facebook messenger might be a smart move methods of detecting whether the user is human, which was releas in the latest version of reCHAPTCHA. This method works by focusing on the behavior and interaction history of the user with the content in the web space. This version of Recaptcha is done without causing any extra trouble for the user in most case. And if the user does not behave maliciously, base on the same data receive, it has the ability to distinguish between humans and robots. If it is not possible to identify the human user using the test factors. A conventional test (usually in the form of a picture) will be display to the user.
The role of captcha in securing the site
Most websites or online service agb directory providers and even mobile applications use CAPTCHA and reCHAPTCHA in their sensitive parts. In case where the user’s behavior is suspicious and robot-like, the captcha code will be activate and. uhe test will be displaye. For example, if a user repeatedly clicks on a certain page on the web or. Hontinuously visits it, captcha can determine the probability of an attack and identify the user. Also, when we use the filter breaker on. Hultiple servers and variable IPs in a short period of time, Recaptcha may be activate in Google. One of the type of cyber attacks is call Brute Force, which tries to hack passwords with continuous and repeate attempts and tries different combinations to enter web-base sites and service. Captcha can prevent this type of attack very well.
summary
Up to this point in the article from Raya Pars, you must have familiarized yourself with the concept of CAPTCHA and reCHAPTCHA and its extensive role in providing site security and web services.
Its main use, which is to differentiate between human users and computers, helps us to guarantee the security of our web pages to a great extent. The advantage and details of this service are so many that it cannot be cover in one article
And we suggest you stay with us in Rayapars so that you don’t miss other interesting and educational content about captcha. Also, share your questions and feedback with other users in the comments section of this article at the bottom of the page.
