Security features in Rails

What are the various Security features provided by Rails.

Thanks,
Pradip

What do you mean by a "security feature"?
And how do you know that there are various?

You might want to read the security book from manuals.rubyonrails.com and, if you consider "security" to include authentication and authorization, continue to browse the long list of authentication-related resources in the wiki. Note that the stuff that's listed in the wiki are not part of Rails itself but are provided as plugins by the community.
[ January 31, 2007: Message edited by: Lasse Koskela ]

What do you mean by a "security feature"?
And how do you know that there are various?

I should have asked how to secure Rails applications. I guessing that there are various ways to secure Rails applications.