Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah excels at HTML sanitization (XSS prevention). It includes some nice HTML sanitizers, which are based on HTML5lib's safelist, so it most likely won't make your codes less secure. (These statements have not been evaluated by Netexperts.) ActiveRecord extensions for sanitization are available in the [`loofah-activerecord` gem](https://github.com/flavorjones/loofah-activerecord).

Brakeman detects security vulnerabilities in Ruby on Rails applications via static analysis.

Adds methods to set and authenticate against one time passwords 2FA(Two factor Authentication). Inspired in AM::SecurePassword"

Codesake::Dawn is a security source code scanner for ruby powered code. Starting from January 07, 2015 this gem is renamed to dawnscanner and this version is no longer supported. Please, upgrade your Gemfile.

Tarantula is a big fuzzy spider. It crawls your Rails 2.3 and 3.x applications, fuzzing data to see what breaks.

xss_terminate is a plugin in that makes stripping and sanitizing HTML stupid-simple. Install and forget. And forget about forgetting to h() your output, because you won‘t need to anymore.

Find likely mass assignment vulnerabilities

Provides two class methods on ActiveController::Base that filter the params hash for that controller's actions. You can think of them as the controller analog of attr_protected and attr_accessible.

This plugin replaces the default ERB template handlers with erubis, and switches the behaviour to escape by default rather than requiring you to escape. This is consistent with the behaviour in Rails 3.0.

Ruby on Rails Plugin that automatically wraps html_escape() around ActiveRecord attribute methods associated with string and text fields in the database.

Lint your Gemfile!

Shell execution made easy and secure

Adds 'sudo' methods to update protected ActiveRecord attributes with mass assignment

A rack middleware for whitelisting and blacklisting IPs

Checks Ruby on Rails models for use of the attr_accessible white list.