0-9 arası sayıları kullanarak random olarak 2 sayı seçer ve yine random olarak toplama ya da çarpma yaparak sonucu verir.

Solve Media CAPTCHA Replacement

simple stupid captcha

LoyalSimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Simple captcha

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification

Block repetetive requests from logged_in users and shows captcha.

Generates and verifies ascii art captcha.

Rails mountable engine, that provides captcha support

HumanDetector is a friendly logic captcha for Rails the doesn't require any external system dependency (e.g. external captcha API connections). It uses a simple question that any 7 or more years old human can understand, but that a spambot will not be able to answer. This Gem supports Ruby v1.9.2 and Rails 3.0.x.

Captcha based on encyrpting and decrypting user data by mathematical operation

Simple negative captcha for Rails

SoaringSimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Submit captcha images and retrieve the text as a string.

Implements view helpers for the ASIRRA CAPTCHA system for Rails-based websites

RedisCaptcha provides simple captcha that can be read by human.

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

Unity Captcha is a gem that use two levels of Captcha. First level is about Left Hemisphere: Logic and Math. Second level is about Right Hemisphere: Intuition and Drawing. This two levels functioning in complete harmony creates unity and this is the base design of this Captcha.

This is a Captcha gem for Rails Applications. It drawing captcha image with C code so it no dependencies.

Anti-spam protection for your website