How can I add basic encryption to password?
I'm creating a basic sign up form using ruby on rails (I'm relatively new to rails), and what I want to know is how can I encrypt the new user's password (for obvious security reasons)?

Here's my registration page:

    <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
    <script type="text/javascript">
      $.noConflict();
      jQuery(document).ready(function($) {
        $('a.close').click(function(){
          $(this).parent().fadeOut();
        });
      });
    </script>
    <% if !flash.now[:notice].blank? %>
    <div class="alert-message error">
      <a class="close" href="#">×</a>
      <p><strong><%= flash.now[:notice][0] %></strong></p>
    </div>
    <% end %>
    <div class="alert-message info">
      <p><strong>Join us. It's as simple as 1 2 3.</strong></p>
    </div>
    <% form_for :user do |f| %>
      <p> Email: <br />  <%= f.text_field :email %></p>
      <p> Name: <br />  <%= f.text_field :name %></p>
      <p> Username:<br /><%= f.text_field :username %></p>
      <p> Password: <br />  <%= f.password_field :password %></p>
      <p> Blog <i>(optional)</i>: <br />  <%= f.text_field :blog %></p>
      <p><%= submit_tag "Create User", :disable_with => "Please wait...", :class => "btn primary" %></p>
    <% end %>

And the User controller:

    class UsersController < ApplicationController   
      def register
        @user = User.new(params[:user])
        if(request.post? and @user.save)
          flash[:notice] = "Account Created Successfully"
          redirect_to root_path      
        else
          flash.now[:notice] = @user.errors.full_messages
        end
      end
      def destroy
        @user = User.find(params[:id])
        @user.destroy
        redirect_to root_path
      end  
    end

Any help would be appreciated. 
Thanks in advance.
How can I add basic encryption to password?
===

I'm creating a basic sign up form using ruby on rails (I'm relatively new to rails), and what I want to know is how can I encrypt the new user's password (for obvious security reasons)?

Here's my registration page:

    <script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
    <script type="text/javascript">
      $.noConflict();
      jQuery(document).ready(function($) {
        $('a.close').click(function(){
          $(this).parent().fadeOut();
        });
      });
    </script>
    <% if !flash.now[:notice].blank? %>
    <div class="alert-message error">
      <a class="close" href="#">×</a>
      <p><strong><%= flash.now[:notice][0] %></strong></p>
    </div>
    <% end %>
    <div class="alert-message info">
      <p><strong>Join us. It's as simple as 1 2 3.</strong></p>
    </div>
    <% form_for :user do |f| %>
      <p> Email: <br />  <%= f.text_field :email %></p>
      <p> Name: <br />  <%= f.text_field :name %></p>
      <p> Username:<br /><%= f.text_field :username %></p>
      <p> Password: <br />  <%= f.password_field :password %></p>
      <p> Blog <i>(optional)</i>: <br />  <%= f.text_field :blog %></p>
      <p><%= submit_tag "Create User", :disable_with => "Please wait...", :class => "btn primary" %></p>
    <% end %>

And the User controller:

    class UsersController < ApplicationController   
      def register
        @user = User.new(params[:user])
        if(request.post? and @user.save)
          flash[:notice] = "Account Created Successfully"
          redirect_to root_path      
        else
          flash.now[:notice] = @user.errors.full_messages
        end
      end
      def destroy
        @user = User.find(params[:id])
        @user.destroy
        redirect_to root_path
      end  
    end

Any help would be appreciated. 
Thanks in advance.