Questions tagged [captcha]

Captcha is a type of challenge-response test used in computing as an attempt to ensure that the response is given by a human being and not generated by a computer.

CAPTCHA is an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart".

A CAPTCHA or Captcha is a type of challenge-response test used in computing as an attempt to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade.

Because other computers are supposedly unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Thus, it is sometimes described as a reverse Turing test, because it is administered by a machine and targeted to a human, in contrast to the standard Turing test that is typically administered by a human and targeted to a machine.

The usual reason for using a CAPTCHA is to prevent automated spam from being posted into a public discussion forum or similar site.

A common type of CAPTCHA requires the user to type letters or digits from a distorted image that appears on the screen. However these are becoming increasing unreliable as the automated spam systems that they are trying to defeat are becoming much better at reading the distorted text. More advanced CAPTCHAs are thus becoming available that require the user to answer more detailed questions or perform more complex actions.

Most CAPTCHAs, particularly the more difficult ones, suffer from accessibility issues. The act of making it difficult for an automated system to read and respond to the CAPTCHA also makes it more difficult for many users with disabilities to access sites that use them. For example, a user who relies on a screen reading web browser may be unable to see the CAPTCHA image. Better CAPTCHA systems will provide solutions to some of these issues, such as an audio alternative, but these users are generally still left at a disadvantage.

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How to integrate AWS WAF Intelligent threat API in my Angular app

I am trying to use AWS Waf ClientSide integration with Intelligent Threat API as a form of silent captcha in my Angular client app. I read AWS Documentation about this but I want to ask if someone has already implemented this in their Angular/React…
unidentified
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Automate image based captcha using java and tesseract

I am trying to automate the captcha using the below code I am getting an error Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language 'eng' Tesseract couldn't load any…
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BotDetect Asp.net Captcha not working on https -

Getting error as "Captcha.UserInputID is not set. Your implementation of BotDetect is not completely secure yet. Please add "yourCaptchaInstance.UserInputID = ;" line to the code that adds Captcha to this form." The code work…
Rujj
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Reload captcha image on the same page

I have a form with captcha validation that looks like this: The code of the captcha inside the html form is the following:
Enter your captcha code:
Andy McRae
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Handling Cloudflare captcha on Login form in Cypress Automated Test?

We recently added this Cloudflare verification to the login form. We login via API for 99% of our tests but still want a few tests that use the actual login form so we know if it's broken. I updated the test to click the captcha but it just get…
George
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Getting spam despite Securimage captcha - how to fix?

Last year, I began building a website for an organisation. It contains a contact form implemented in PHP, with a Securimage captcha. Today I checked the database table into which contact messages are archived, and discovered it to be full of spam! …
Stewart
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Pause and resume scraper to solve captcha manually

I use Goutte scraper package in php. I want to manually solve the captcha while scraping. I am able to detect a catpcha picture. I also created a form to write captcha value and pass it to the scraper but the problem is that when I enter the captcha…
aminjabari
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Friendly Captcha - Is a verification request necessary?

I am integrating Friendly Captcha for the first time and I follow the official tutorial: https://docs.friendlycaptcha.com/#/installation After step two my web application correctly solves the puzzle and disables "I am human.": Now, I am wondering…
Michelle
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Selenium - Making the invisible browser visible

I will register on a website and perform a few actions using Selenium.But there is an hcaptcha verification during the registration process.Is there a way to bypass or overcome the hcaptcha verification?(free) I couldn't find a way to bypass the…
makalidap
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How to use captcha botdetect in MVC Core 6.0?

Hi I am trying to implement the captcha of botdetect in MVC Core 6. After a lots of search i don't find any solution for MVC Core 6. If Anyone have an idea for using on mvc 6.0 than tell me. steps completed on my side are: Installation of Captcha…
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Extract text from this captcha using python

i have tried multiple programs to extract text from this image using opencv and pytesseract, but it returns empty string. Here's my code import cv2 import pytesseract # Set the path to the pytesseract…
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Trying to handle captcha validation from server side using flask

here is my html code CAPTCHA Challenge