Simple captcha image generator gem

Simple, easy captcha for Sinatra

RedisCaptcha provides simple captcha that can be read by human.

Death by Captcha Ruby implementation (HTTP API)

This library can help you create a captcha in your terminal application, which may be damaged by a large influx of requests.

Helps humankind with simpler captchas

Form protection with simple captcha calculations.

Merb plugin that provides resource access rate limits and captcha'ing

Merb plugin that provides resource access rate limits and captcha'ing

This is mt first gem

This version include two important page 'Contact' and 'Register' with the 'Math-Captcha' method submit for prevent hacker attack.

Integrate the AreYouAHuman.com CAPTCHA alternative human verification into your Ruby/Rails application

This is a gem wrapper for tiny captcha in C with no dependencies.

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

这是一个验证码生成器。基于rucaptcha。本人只是将他的源码拉下来。为我的网站进行适配。因为我不使用sesion.id

NO LONGER MAINTAINED AND NOT RECOMMENDED, AS BOTS ARE ABLE TO RESOLVE CAPTCHAS BETTER THAN HUMANS. Based on Login Attempts check if captcha is necessary. It stores a permanent cookie and uses a table for tracking login requests.

dongsx

A simple image captcha gem