What are all the security measures I should check over before deploying my Rails application?

Question

I want to make sure all security aspects of my application are covered. I know this will probably vary from application to application, but what are the general things you should make sure you are doing to prevent security breaches?

Answer 1

Ryan Bates did a nice railscast on security that i have gotten something out of, you may want to check it out.

http://railscasts.com/episodes/178-seven-security-tips