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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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2
votes
0answers
96 views

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 ...
4
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2answers
168 views

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 ...
2
votes
1answer
182 views

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 ...
1
vote
1answer
149 views

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 ...
3
votes
1answer
2k views

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 ...
2
votes
1answer
4k views

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'...
18
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2answers
3k views

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 ...
3
votes
2answers
6k views

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 ...
1
vote
1answer
1k views

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 ...
10
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3answers
570 views

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 ...
8
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3answers
10k views

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 ...
6
votes
2answers
1k views

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 ...
3
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1answer
776 views

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 ...
6
votes
1answer
2k views

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 '...
1
vote
2answers
5k views

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 ...
2
votes
1answer
135 views

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 ...
5
votes
2answers
565 views

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 ...
3
votes
2answers
164 views

A small extension to the reCaptcha library

I have been writing a small extension to the reCaptcha library. ...
2
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2answers
180 views

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 ...