Questions tagged [captcha]

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What link shorteners support captcha before redirect?

It seems that all link shortener service advertise themselves as no captcha require. However, I'd like to have the opposite: visitors need to click the captcha before continue. This article The Top 14 ...
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9 views

Android Recaptcha Alternative

Is there any alternative for reCaptcha for Android. I found some for the website but not for android. I need to implement captcha as part of Log In process. I used Android Re-Captcha on our app side. ...
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Android app to screen robocalls by forcing caller to press a certain key combination? (audio CAPTCHA)

I am trying to stop all those junk calls I am getting, I have tried quite a few apps like Hiya, TrueCaller etc; unfortunately, phone numbers are easy to spoof and those apps can't screen all that spam ...
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6 views

Firefox or Chromium addon to fail CAPTCHA tests

My website has a contact form, and I was getting spam so I implemented CAPTCHA protection. I tested my implementation and it seems to work for humans, meaning that I am able to use the contact form. ...
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21 views

Object detection dataset generation captcha

Is there a pre-existing CAPTCHA library that I can use to build my object detection dataset for machine learning? I want to do what Google did with reCaptcha. I am not trying to solve captchas, or ...
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22 views

App or service that blocks robocallers

I tried RoboKiller but it didn't work and I still received robo calls, 3 on the first day. It blocked 0 robo calls during my 6 days of trial. It is ineffective because it uses white lists and black ...
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1answer
35 views

Captcha library that doesn't need to load a new page?

I am using this PHP captcha tool on my website: https://web.archive.org/web/20060703144957/http://www.white-hat-web-design.co.uk/articles/php-captcha.php After filling out a form, and depending on ...
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2answers
69 views

Captcha or other tool to check for human user

As Mailhide will be discontinued (to my understanding in Feb 2018), I need a new tool/service to check whether a human user wants to obtain the email address of an employee on our website. Key ...
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1answer
197 views

reCaptcha alternative

I am looking for an open source, or privacy conscious alternative to reCaptcha. Or any other bot protection for web forms. Preferably in PHP or JavaScript. At a minimum, free and not Google.
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66 views

Free CAPTCHA plugin for WordPress

I started a WordPress blog a while ago and for the past month or so, I have been the target of comment spam. The most obvious solution? Use CAPTCHA against bots. Google has recently updated its ...
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1answer
4k views

Simple CAPTCHA for AngularJS

I am looking for CAPTCHA implementation or configuration in AngularJS project without using the reCAPTCHA concepts.
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85 views

CAPTCHA for MediaWiki [closed]

I read this about ReCaptcha: Unfortunately, as of 2011, some spammers appear to have figured out a way to bypass it, either through character recognition or by using humans. For that reason, it ...