RecaptchaV2

When searching through Google, sometimes we will encounter Google forcing us to select images according to the description. After we choose the correct images, Google will let us start searching. In addition, some other websites also force us to choose similar images. It is a test that helps distinguish users from automated systems when accessing a website that uses reCAPTCHA. If you are looking for a reputable reCAPTCHA v2 solving service, then follow the following article of 2captcha.net.

Overview of what is reCAPTCHA?

Based on CAPTCHA researched and developed by Luis von Ahn, Ben Maurer, Colin McMillen, Harshad Bhujbal, Manuel Blum.

- Developed by Google.

- First release on March 27, 2007.

- Current version is v3.

- Website: www.google.com/recaptcha/

What is reCAPTCHA v1?

First, reCAPTCHA is a technology based on a CAPTCHA system. CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart". The system name is quite long, but in short, it is a test used to determine whether the access comes from the user or whether the access is automatically generated by the computer.

The Turing Test, simply put, is a test that differentiates humans and computers through certain forms of testing.

CAPTCHA is sometimes called a reverse Turing test because CAPTCHA has a human tester (determining whether it is human or not) while a Turing test has a computer tester (determining whether it is a human or not). whether it is a computer or not), even though for both tests, humans and computers are test participants.

CAPTCHA is designed based on a number of differences between human perception of information and computers. For example, in the past, reading text on an image was a very normal thing for humans, but for computers it used to be a very difficult thing.

reCAPTCHA is developed by Google and is free to use. The original purpose of reCAPTCHA was to help websites prevent spambots: a pre-programmed computer that sends a lot of requests (that normal people cannot send in a short period of time) for a certain purpose. that (crawler data, DoS,...) affects the operation of the web server.

reCAPTCHA v1 is based on handwriting recognition

Like the reCAPTCHA frames in the image above, in the red frame, we can read the text written as "Levelers critics". But with pre-programmed automatic systems, "reading" will be difficult because computers are not like humans, when most users are too accustomed to reading words through their eyes and remembering them internally. Brain.

Below each reCAPTCHA frame, there is an input bar where we can enter the word shown above. If correct, the person entering will be judged to pass the test (or human), but if incorrect, the person entering will have to try again with a different image.

With v1, reCAPTCHA mainly offers tests that require users to read and fill in text on images. These text images are scanned from paper books, then preprocessed to create the images shown above. This has helped many books and newspapers to be digitally archived, such as The New York Times and Google Books.

And from here, a "war" broke out around reCAPTCHA, leading to changes to reCAPTCHA, with the participation of many parties and many related technologies:

reCAPTCHA faction: reCAPTCHA v1 first versions had text scanned from books and newspapers, with the same typeface and font as when printed and scanned. Letters are selected via OCR (Optical character recognition)

Optical character recognition (OCR) is a technology used to convert text written on images into characters stored on a computer.

The computer side impersonates the user: Using the same OCR technology but with better algorithms to create programs that can recognize better than the side that created reCAPTCHA.

reCAPTCHA faction: Increases the difficulty of letters and characters in many ways: blurring characters, distorting letters, crossing out letters, creating different background colors within a word, handwriting...

Computers pretend to be users: Continue to upgrade OCR and can solve many reCAPTCHA images. For example, a program by Claudia Cruz, Fernando Uceda, and Leobardo Reyes published on February 27, 2012 claims to be able to solve with 82% accuracy.

User Impersonation: CAPTCHA farming, a form of using another person to solve CAPTCHA systems on behalf of the user. Because the test examiner is human, the test can be passed easily. These CAPTCHA solvers are called CAPTCHA farmers.

CAPTCHA farmers are considered people who "take" the CAPTCHA test.

reCAPTCHA faction: Using measures to prevent CAPTCHA farming such as blocking IPs, identifying computers and browsers through identifiable data or called Browser fingerprinting,...

After many years, the difficulty of handwriting recognition reCAPTCHAs has reached a level that neither computers nor users themselves can solve. Finally, on March 31, 2018, Google announced the end of reCAPTCHA v1 or written reCAPTCHA, and replaced it with reCAPTCHA v2.

reCAPTCHA v2

reCAPTCHA v2 instead of using text images will use images and ask the user to select an image box according to the description such as: select images containing road markings, select image boxes containing signs ,… But first, a tickbox with the content "I'm not a robot" will appear.

reCAPTCHA "Select all images that contain a boat

When the user ticks, Google will analyze the information of the person who just sent the request in a number of ways such as: Google account being logged in, browser cookies, browsing history, etc. If Google's assessment says that Users are not pre-programmed programs, users will not have to choose images but will pass the test.

With both reCAPTCHA v1 and v2, users can choose to listen to audio instead of viewing images. For v1, we click on the speaker image and for v2, we click on the headphone image. At this time, reCAPTCHA will send an audio clip (usually a recording of reading a certain number or words), the listener must listen and fill in the word heard and then click confirm.

Extremely fast reCAPTCHA v2 solving service

2captcha.net is an automatic recaptcha solving and overcoming system, including reCAPTCHA v2 solving with extremely fast speed, 3-5 times faster than foreign services, very cheap price compared to the effectiveness, helping You optimize and automate your work.

Advantages of our ReCaptcha V2 bypass system:
Use high-tech artificial intelligence (AI) to decode captcha
Recaptcha solving speed is very fast, only 3-12 seconds on average
There is an extension beyond recaptcha v2 for popular browsers Chrome, Firefox, Coc Coc
Parallel processing of thousands of requests at the same time, accuracy rate > 98%
The price is extremely cheap compared to the results
There are many backup servers to avoid risks for customers
The system has an API that helps easily integrate recaptcha bypass with other systems/tools
There is a quick and enthusiastic technical support team
Fast process, flexible payment, automatically approves deposits for customers

Reputable Google ReCaptcha surpassing service

Procedure for registering and using the ReCaptcha V2 solving service

Step 1: Visit the website anticaptcha.top and register an account. If you already have an account, go to Step 2.
Step 2: Log in with the account you had in Step 1
Step 3: See API documentation or use Extension (if using Extension to solve, skip step 4)
Step 4: Write code to integrate recaptcha solver into your web/software/app system
Step 5: Deposit money into your user account and start using