CAPTCHA for your website

Despite its intrusiveness, this feature helps protect the server from overload and more. We offer you to learn a little more about captcha and how to install it on your site. 

The emergence of the term CAPTCHA

When new website formats appeared in the late 90s with the ability to chat in real-time, the most enterprising programmers began to create chatbots. It was beneficial for hackers both to get money and just for fun. 

Chatbots performed thousands of times more transactions than regular users. This caused the site to go down or the server to be constantly overloaded. It was to address these issues that CAPTCHA was created in 2000. 

The creator of the defender was the private Carnegie University. CAPTCHA is an abbreviation for Completely Automated Public Turing test to tell Computers and Humans Apart - a fully automated public Turing test to distinguish between computers and humans. Such a long definition would hardly have taken root in everyday life, so the captcha abbreviation has become ideal for all users. 

In essence, the Turing test is generated by the program code and is necessary to determine whether a system user is a human or a bot. In other words, the captcha returns random characters or images that are easily identified by a human, but the bot cannot identify them. Protection allows you to exclude all unwanted "guests" from the site.

Types of captcha

Today there are many types and subspecies of captcha. Developers create their guards using the PHP programming language to give their projects some personality. We have chosen the most common types for presentation, because. they are found on most platforms:

captcha

One of the earliest captchas was yaCAPTCHA. Even though it was developed 15 years ago, it still reliably protects all sites from bots. But many users, to put it mildly, do not like him, because. almost no one succeeds in deciphering the written letters the first time. Since then, many analogs of the defender have appeared, which, in comparison with the classic ones, are even more sophisticated. So many developers add noise, pixelation, and other additions to a picture with letters of different sizes.

reCAPTCHA

The most popular captcha is reCAPTCHA by Google. More than 700,000,000 users go through it every day. It can have both digital and text formats, and at the same time performs not only a protective function. So, with the help of a captcha and users who pass it, Google digitizes about 100,000,000 words every day and recognizes street names, places, locations, etc. for Google. Maps. 

Anti-Spam Image

Despite its unaesthetic and absolute inconsistency with the site's modern design, many developers implement the Anti-Spam Image captcha. It looks like an image with a special code. The latter can be recognized the first time, saving the user time and nerves. This defender has excellent functionality and remains competitive to this day.

checkbox

The simplest captcha option for both developers and users is CheckBot. To add it to the site, just make a couple of clicks, it is also easy to configure it. And users need to choose one picture with a “little man” out of several, based on a scheduled task. A person can easily cope with the task in a couple of seconds, but a bot cannot do it.

Math Comment Spam Protection

Also easy to implement and use is Math Comment Spam Protection. It is easy to install and set up on the site. It is represented by an image with numbers and mathematical operations, next to which there is a window for entering the answer. It will be easy for a human to add 2 + 2, but most bots will not even be able to read the numbers from the image.