Questions tagged [captcha]
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.
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Simple image captcha test in Java and JS (revised version)
Following on from my previous question, I would like to know what could be improved here and whether it is now secure.
I had to use Java 8 because the Blade lib was built with it, and I want to extend ...
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Implement a simple image captcha test yourself in Java and JS
First of all: I was looking for a simple image captcha solution for a website, but all I found were "Over-the-top" solutions for me. So I decided to write something to self.
I mainly use two ...
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Contact form with AJAX call and secured PHP with Google reCAPTCHA v3
here is a code of a simple contact form that I have created, I believe that the form is server-side protected against empty fields, header injections, CSRF, XSS, bots using 'Google reCAPTCHA v3' and ...
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Captcha Letter Extraction
We are developing an automatic text Captcha solver in python 3. The solver has a module that is responsible for extracting letters out of captcha images that contain 4 letters each. We would like to ...
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PHP contact form script
I have created a contact form that originally did not have any mechanism for sending out the email with whatever the user inputted in the fields. I have added it in here along with ReCaptcha check. I ...
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Creating CAPTCHA in ColdFusion then showing image in Vue.js
I am trying to create a CAPTCHA image on ColdFusion. ColdFusion will be producing REST services and hence will have to push the image via JSON. I want the image to be self contained. I don't want to ...
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Solve Google Captchas automatically [closed]
So basically I have done a reader through Google demo where it grabs the CAPTCHA site-key, then it takes us to main method where I run multiprocessing where I enter ...
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Server side validation for reCAPTCHA V2 or Invisible reCAPTCHA with Java (Servlet)
The main reason for this post is that I spent quite a lot of time searching the easiest way to validate recaptcha V2. So I'm going to share my knowledge to avoid further time wastage of developers.
I'...
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Python bot to answer mathematical questions for a remote server
The MSP Tech Club puts on an annual CTF, available here. I've worked on a solution but was wondering if there's a better way to write it or if I have any particular bad habits showing themselves?
The ...
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PHP contact form using PHPMailer and Google Recaptcha
My company is designing a new site, and because I'm currently on bench I've been tasked with writing any PHP required. Pretty simple stuff, just a contact form and a resume upload page, both using a ...
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PHP e-mail form with ReCAPTCHA
I want to ask if you can review the code for a simple contact form and the PHP code which sends me an email once a visitor fills the form and is validated through Recaptcha
On my index.php file here ...
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Google reCAPTCHA Validator: Iteration III
This is the third iteration of my reCAPTCHA validator. Iteration II can be found at: Google reCAPTCHA Validator: Iteration II
It does almost everything required to do reCAPTCHA validation on anything ...
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Simple Google ReCaptcha validation
Linked:
Google reCAPTCHA Validator: Iteration II
I have also created a simple Google Recaptcha Validation class to handle verification.
I used some code from CodingFusion's post Google New ...
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Google reCAPTCHA Validator: Iteration II
This is a follow-up to the other post I made (less than an hour ago) about my Google reCAPTCHA C# implementation: Google reCAPTCHA Validator
This adds support for error messages, so that you can ...
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Google reCAPTCHA Validator
This entire class came out of a chat discussion, and I'm curious on how it looks. (This is like literally 30 minutes of development time.)
The idea is to allow very easy, quick implementations of ...
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CAPTCHA reader and maker
I've made some CAPTCHA reader and maker in Python using Tkinter. Do you know if it's possible to keep image and output files in "memory" not writing them on disc? Because right now everything is '...
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Servlet and JSP for user registration, with CAPTCHA and error handling
I have a form that submits to a registration Servlet, which inserts a new user to the database when they sign up to the web application. Depending on the erroneous user input, the Servlet will ...
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CAPTCHA with images of objects
This CAPTCHA is not text but basically images of objects that the users has to identify between an array of options. My current code is kind-of slow because the query takes almost .7s to execute and ...
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Numeric selfmade CAPTCHA in Windows application
Nowadays many sites introduce CAPTCHAs (Completely Automated Public Turing test to tell Computers and Humans Apart) for securing their sites. I wish to introduce the technique in windows forms, as ...
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A small extension to the reCaptcha library
I have been writing a small extension to the reCaptcha library.
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Detecting if a CAPTCHA is needed
I wish to ask if the code written below has any holes (probably it will be useful for someone else). This code checks, by IP and by userid, if more than 5 attempts ...
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