diff --git a/Gemfile b/Gemfile
index 1b064d32..b0889bc4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,6 @@ source "https://rubygems.org"
 gemspec
 
 gem "rails", "~> 4.0.0.beta", github: "rails/rails", branch: "master"
-gem "protected_attributes", "~> 1.0.0"
 gem "omniauth", "~> 1.0.0"
 gem "omniauth-oauth2", "~> 1.0.0"
 gem "rdoc"
diff --git a/Gemfile.lock b/Gemfile.lock
index 16c64625..80b5b3d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,8 +111,6 @@ GEM
     origin (1.0.11)
     orm_adapter (0.4.0)
     polyglot (0.3.3)
-    protected_attributes (1.0.1)
-      activemodel (>= 4.0.0.beta, < 5.0)
     rack (1.5.2)
     rack-openid (1.3.1)
       rack (>= 1.1.0)
@@ -162,7 +160,6 @@ DEPENDENCIES
   omniauth-facebook
   omniauth-oauth2 (~> 1.0.0)
   omniauth-openid (~> 1.0.1)
-  protected_attributes (~> 1.0.0)
   rails (~> 4.0.0.beta)!
   rdoc
   sqlite3
diff --git a/app/controllers/devise/confirmations_controller.rb b/app/controllers/devise/confirmations_controller.rb
index 68014c92..b039a477 100644
--- a/app/controllers/devise/confirmations_controller.rb
+++ b/app/controllers/devise/confirmations_controller.rb
@@ -1,7 +1,7 @@
 class Devise::ConfirmationsController < DeviseController
   # GET /resource/confirmation/new
   def new
-    build_resource({})
+    self.resource = resource_class.new
   end
 
   # POST /resource/confirmation
@@ -39,5 +39,4 @@ class Devise::ConfirmationsController < DeviseController
     def after_confirmation_path_for(resource_name, resource)
       after_sign_in_path_for(resource)
     end
-
 end
diff --git a/app/controllers/devise/passwords_controller.rb b/app/controllers/devise/passwords_controller.rb
index a568d87f..c92421ea 100644
--- a/app/controllers/devise/passwords_controller.rb
+++ b/app/controllers/devise/passwords_controller.rb
@@ -5,7 +5,7 @@ class Devise::PasswordsController < DeviseController
 
   # GET /resource/password/new
   def new
-    build_resource({})
+    self.resource = resource_class.new
   end
 
   # POST /resource/password
diff --git a/app/controllers/devise/registrations_controller.rb b/app/controllers/devise/registrations_controller.rb
index 281979a7..a990c93a 100644
--- a/app/controllers/devise/registrations_controller.rb
+++ b/app/controllers/devise/registrations_controller.rb
@@ -4,13 +4,13 @@ class Devise::RegistrationsController < DeviseController
 
   # GET /resource/sign_up
   def new
-    resource = build_resource({})
-    respond_with resource
+    build_resource({})
+    respond_with self.resource
   end
 
   # POST /resource
   def create
-    build_resource
+    self.resource = build_resource(sign_up_params)
 
     if resource.save
       if resource.active_for_authentication?
@@ -40,7 +40,7 @@ class Devise::RegistrationsController < DeviseController
     self.resource = resource_class.to_adapter.get!(send(:"current_#{resource_name}").to_key)
     prev_unconfirmed_email = resource.unconfirmed_email if resource.respond_to?(:unconfirmed_email)
 
-    if resource.update_with_password(resource_params)
+    if resource.update_with_password(account_update_params)
       if is_navigational_format?
         flash_key = update_needs_confirmation?(resource, prev_unconfirmed_email) ?
           :update_needs_confirmation : :updated
@@ -83,8 +83,7 @@ class Devise::RegistrationsController < DeviseController
   # Build a devise resource passing in the session. Useful to move
   # temporary session data to the newly created user.
   def build_resource(hash=nil)
-    hash ||= resource_params || {}
-    self.resource = resource_class.new_with_session(hash, session)
+    self.resource = resource_class.new_with_session(hash || {}, session)
   end
 
   # Signs in a user on sign up. You can overwrite this method in your own
@@ -116,4 +115,12 @@ class Devise::RegistrationsController < DeviseController
     send(:"authenticate_#{resource_name}!", :force => true)
     self.resource = send(:"current_#{resource_name}")
   end
+
+  def sign_up_params
+    devise_parameter_sanitizer.for(:sign_up)
+  end
+
+  def account_update_params
+    devise_parameter_sanitizer.for(:account_update)
+  end
 end
diff --git a/app/controllers/devise/sessions_controller.rb b/app/controllers/devise/sessions_controller.rb
index e3760370..9c355f38 100644
--- a/app/controllers/devise/sessions_controller.rb
+++ b/app/controllers/devise/sessions_controller.rb
@@ -5,7 +5,7 @@ class Devise::SessionsController < DeviseController
 
   # GET /resource/sign_in
   def new
-    self.resource = build_resource(nil, :unsafe => true)
+    self.resource = resource_class.new(sign_in_params)
     clean_up_passwords(resource)
     respond_with(resource, serialize_options(resource))
   end
@@ -34,6 +34,10 @@ class Devise::SessionsController < DeviseController
 
   protected
 
+  def sign_in_params
+    devise_parameter_sanitizer.for(:sign_in)
+  end
+
   def serialize_options(resource)
     methods = resource_class.authentication_keys.dup
     methods = methods.keys if methods.is_a?(Hash)
diff --git a/app/controllers/devise/unlocks_controller.rb b/app/controllers/devise/unlocks_controller.rb
index 45f6b2c1..a8c751ed 100644
--- a/app/controllers/devise/unlocks_controller.rb
+++ b/app/controllers/devise/unlocks_controller.rb
@@ -3,7 +3,7 @@ class Devise::UnlocksController < DeviseController
 
   # GET /resource/unlock/new
   def new
-    build_resource({})
+    self.resource = resource_class.new
   end
 
   # POST /resource/unlock
diff --git a/app/controllers/devise_controller.rb b/app/controllers/devise_controller.rb
index 94359769..6799d5ac 100644
--- a/app/controllers/devise_controller.rb
+++ b/app/controllers/devise_controller.rb
@@ -28,10 +28,6 @@ class DeviseController < Devise.parent_controller.constantize
     devise_mapping.to
   end
 
-  def resource_params
-    params[resource_name]
-  end
-
   # Returns a signed in resource from session (if one exists)
   def signed_in_resource
     warden.authenticate(:scope => resource_name)
@@ -93,23 +89,6 @@ MESSAGE
     instance_variable_set(:"@#{resource_name}", new_resource)
   end
 
-  # Build a devise resource.
-  # Assignment bypasses attribute protection when :unsafe option is passed
-  def build_resource(hash = nil, options = {})
-    hash ||= resource_params || {}
-
-    if options[:unsafe]
-      self.resource = resource_class.new.tap do |resource|
-        hash.each do |key, value|
-          setter = :"#{key}="
-          resource.send(setter, value) if resource.respond_to?(setter)
-        end
-      end
-    else
-      self.resource = resource_class.new(hash)
-    end
-  end
-
   # Helper for use in before_filters where no authentication is required.
   #
   # Example:
@@ -181,4 +160,8 @@ MESSAGE
       format.any(*navigational_formats, &block)
     end
   end
+
+  def resource_params
+    params.fetch(resource_name, {})
+  end
 end
diff --git a/lib/devise.rb b/lib/devise.rb
index 87e1f307..4e103436 100644
--- a/lib/devise.rb
+++ b/lib/devise.rb
@@ -6,12 +6,14 @@ require 'set'
 require 'securerandom'
 
 module Devise
-  autoload :Delegator,     'devise/delegator'
-  autoload :FailureApp,    'devise/failure_app'
-  autoload :OmniAuth,      'devise/omniauth'
-  autoload :ParamFilter,   'devise/param_filter'
-  autoload :TestHelpers,   'devise/test_helpers'
-  autoload :TimeInflector, 'devise/time_inflector'
+  autoload :Delegator,          'devise/delegator'
+  autoload :FailureApp,         'devise/failure_app'
+  autoload :OmniAuth,           'devise/omniauth'
+  autoload :ParamFilter,        'devise/param_filter'
+  autoload :BaseSanitizer,      'devise/parameter_sanitizer'
+  autoload :ParameterSanitizer, 'devise/parameter_sanitizer'
+  autoload :TestHelpers,        'devise/test_helpers'
+  autoload :TimeInflector,      'devise/time_inflector'
 
   module Controllers
     autoload :Helpers, 'devise/controllers/helpers'
diff --git a/lib/devise/controllers/helpers.rb b/lib/devise/controllers/helpers.rb
index a83a77d0..991f7ab5 100644
--- a/lib/devise/controllers/helpers.rb
+++ b/lib/devise/controllers/helpers.rb
@@ -80,6 +80,17 @@ module Devise
         is_a?(DeviseController)
       end
 
+      # Setup a param sanitizer to filter parameters using strong_parameters. See
+      # lib/devise/controllers/parameter_sanitizer.rb for more info. Override this
+      # method in your application controller to use your own parameter sanitizer.
+      def devise_parameter_sanitizer
+        @devise_parameter_sanitizer ||= if defined?(ActionController::StrongParameters)
+          Devise::ParameterSanitizer.new(resource_class, resource_name, params)
+        else
+          Devise::BaseSanitizer.new(resource_class, resource_name, params)
+        end
+      end
+
       # Tell warden that params authentication is allowed for that specific page.
       def allow_params_authentication!
         request.env["devise.allow_params_authentication"] = true
diff --git a/lib/devise/parameter_sanitizer.rb b/lib/devise/parameter_sanitizer.rb
new file mode 100644
index 00000000..6ce00211
--- /dev/null
+++ b/lib/devise/parameter_sanitizer.rb
@@ -0,0 +1,59 @@
+module Devise
+  class BaseSanitizer
+    attr_reader :params, :resource_name, :resource_class
+
+    def initialize(resource_class, resource_name, params)
+      @resource_class = resource_class
+      @resource_name  = resource_name
+      @params         = params
+      @blocks         = Hash.new
+    end
+
+    def for(kind, &block)
+      if block_given?
+        @blocks[kind] = block
+      else
+        block = @blocks[kind]
+        block ? block.call(default_params) : fallback_for(kind)
+      end
+    end
+
+    private
+
+    def fallback_for(kind)
+      default_params
+    end
+
+    def default_params
+      params.fetch(resource_name, {})
+    end
+  end
+
+  class ParameterSanitizer < BaseSanitizer
+    private
+
+    def fallback_for(kind)
+      if respond_to?(kind, true)
+        send(kind)
+      else
+        raise NotImplementedError, "Devise Parameter Sanitizer doesn't know how to sanitize parameters for #{kind}"
+      end
+    end
+
+    def sign_in
+      default_params.permit(auth_keys)
+    end
+
+    def sign_up
+      default_params.permit(auth_keys + [:password, :password_confirmation])
+    end
+
+    def account_update
+      default_params.permit(auth_keys + [:password, :password_confirmation, :current_password])
+    end
+
+    def auth_keys
+      resource_class.authentication_keys
+    end
+  end
+end
diff --git a/lib/generators/active_record/devise_generator.rb b/lib/generators/active_record/devise_generator.rb
index 35541d91..f566cd15 100644
--- a/lib/generators/active_record/devise_generator.rb
+++ b/lib/generators/active_record/devise_generator.rb
@@ -22,10 +22,7 @@ module ActiveRecord
       end
 
       def inject_devise_content
-        content = model_contents + <<CONTENT
-  # Setup accessible (or protected) attributes for your model
-  attr_accessible :email, :password, :password_confirmation, :remember_me
-CONTENT
+        content = model_contents
 
         class_path = if namespaced?
           class_name.to_s.split("::")
diff --git a/test/controllers/internal_helpers_test.rb b/test/controllers/internal_helpers_test.rb
index 939549b6..daa338fe 100644
--- a/test/controllers/internal_helpers_test.rb
+++ b/test/controllers/internal_helpers_test.rb
@@ -34,10 +34,13 @@ class HelpersTest < ActionController::TestCase
   end
 
   test 'get resource params from request params using resource name as key' do
-    user_params = {'name' => 'Shirley Templar'}
-    @controller.stubs(:params).returns(HashWithIndifferentAccess.new({'user' => user_params}))
+    user_params = {'email' => 'shirley@templar.com'}
+    @controller.stubs(:params).returns(ActionController::Parameters.new({'user' => user_params}))
+    # Stub controller name so strong parameters can filter properly.
+    # DeviseController does not allow any parameters by default.
+    @controller.stubs(:controller_name).returns(:sessions_controller)
 
-    assert_equal user_params, @controller.resource_params
+    assert_equal user_params, @controller.send(:resource_params)
   end
 
   test 'resources methods are not controller actions' do
diff --git a/test/generators/active_record_generator_test.rb b/test/generators/active_record_generator_test.rb
index f4160034..73971967 100644
--- a/test/generators/active_record_generator_test.rb
+++ b/test/generators/active_record_generator_test.rb
@@ -10,13 +10,11 @@ if DEVISE_ORM == :active_record
 
     test "all files are properly created with rails31 migration syntax" do
       run_generator %w(monster)
-      assert_file "app/models/monster.rb", /devise/, /attr_accessible (:[a-z_]+(, )?)+/
       assert_migration "db/migrate/devise_create_monsters.rb", /def change/
     end
 
     test "all files for namespaced model are properly created" do
       run_generator %w(admin/monster)
-      assert_file "app/models/admin/monster.rb", /devise/, /attr_accessible (:[a-z_]+(, )?)+/
       assert_migration "db/migrate/devise_create_admin_monsters.rb", /def change/
     end
 
@@ -68,7 +66,7 @@ if DEVISE_ORM == :active_record
       simulate_inside_engine(RailsEngine::Engine, RailsEngine) do
         run_generator ["monster"]
 
-        assert_file "app/models/rails_engine/monster.rb", /devise/,/attr_accessible (:[a-z_]+(, )?)+/
+        assert_file "app/models/rails_engine/monster.rb", /devise/
       end
     end
   end
diff --git a/test/models/database_authenticatable_test.rb b/test/models/database_authenticatable_test.rb
index 1439a51f..a8577c22 100644
--- a/test/models/database_authenticatable_test.rb
+++ b/test/models/database_authenticatable_test.rb
@@ -111,13 +111,6 @@ class DatabaseAuthenticatableTest < ActiveSupport::TestCase
     assert user.reload.valid_password?('pass4321')
   end
 
-  test 'should update password with valid current password and :as option' do
-    user = create_user
-    assert user.update_with_password(:current_password => '12345678',
-      :password => 'pass4321', :password_confirmation => 'pass4321', :as => :admin)
-    assert user.reload.valid_password?('pass4321')
-  end
-
   test 'should add an error to current password when it is invalid' do
     user = create_user
     assert_not user.update_with_password(:current_password => 'other',
@@ -170,12 +163,6 @@ class DatabaseAuthenticatableTest < ActiveSupport::TestCase
     assert_equal 'new@example.com', user.email
   end
 
-  test 'should update the user without password with :as option' do
-    user = create_user
-    user.update_without_password(:email => 'new@example.com', :as => :admin)
-    assert_equal 'new@example.com', user.email
-  end
-
   test 'should not update password without password' do
     user = create_user
     user.update_without_password(:password => 'pass4321', :password_confirmation => 'pass4321')
diff --git a/test/parameter_sanitizer_test.rb b/test/parameter_sanitizer_test.rb
new file mode 100644
index 00000000..5043dd06
--- /dev/null
+++ b/test/parameter_sanitizer_test.rb
@@ -0,0 +1,51 @@
+require 'test_helper'
+require 'devise/parameter_sanitizer'
+
+class BaseSanitizerTest < ActiveSupport::TestCase
+  def sanitizer
+    Devise::BaseSanitizer.new(User, :user, { user: { "email" => "jose" } })
+  end
+
+  test 'returns chosen params' do
+    assert_equal({ "email" => "jose" }, sanitizer.for(:sign_in))
+  end
+end
+
+if defined?(ActionController::StrongParameters)
+  require 'active_model/forbidden_attributes_protection'
+
+  class ParameterSanitizerTest < ActiveSupport::TestCase
+    def sanitizer(params)
+      params = ActionController::Parameters.new(params)
+      Devise::ParameterSanitizer.new(User, :user, params)
+    end
+
+    test 'filters some parameters on sign in by default' do
+      sanitizer = sanitizer(user: { "email" => "jose", "password" => "invalid" })
+      assert_equal({ "email" => "jose" }, sanitizer.for(:sign_in))
+    end
+
+    test 'filters some parameters on sign up by default' do
+      sanitizer = sanitizer(user: { "email" => "jose", "role" => "invalid" })
+      assert_equal({ "email" => "jose" }, sanitizer.for(:sign_up))
+    end
+
+    test 'filters some parameters on account update by default' do
+      sanitizer = sanitizer(user: { "email" => "jose", "role" => "invalid" })
+      assert_equal({ "email" => "jose" }, sanitizer.for(:account_update))
+    end
+
+    test 'allows custom hooks' do
+      sanitizer = sanitizer(user: { "email" => "jose", "password" => "invalid" })
+      sanitizer.for(:sign_in) { |user| user.permit(:email, :password) }
+      assert_equal({ "email" => "jose", "password" => "invalid" }, sanitizer.for(:sign_in))
+    end
+
+    test 'raises on unknown hooks' do
+      sanitizer = sanitizer(user: { "email" => "jose", "password" => "invalid" })
+      assert_raise NotImplementedError do
+        sanitizer.for(:unknown)
+      end
+    end
+  end
+end
diff --git a/test/rails_app/app/mongoid/shim.rb b/test/rails_app/app/mongoid/shim.rb
index 602d059c..f74e8711 100644
--- a/test/rails_app/app/mongoid/shim.rb
+++ b/test/rails_app/app/mongoid/shim.rb
@@ -2,7 +2,6 @@ module Shim
   extend ::ActiveSupport::Concern
 
   included do
-    include ::ActiveModel::MassAssignmentSecurity
     include ::Mongoid::Timestamps
     field :created_at, :type => DateTime
   end
diff --git a/test/rails_app/config/application.rb b/test/rails_app/config/application.rb
index 9f942f9b..5744dae7 100644
--- a/test/rails_app/config/application.rb
+++ b/test/rails_app/config/application.rb
@@ -32,11 +32,6 @@ module RailsApp
 
     config.action_mailer.default_url_options = { :host => "localhost:3000" }
 
-    if DEVISE_ORM == :active_record
-      # Disable forcing whitelist attributes from protected attributes.
-      config.active_record.whitelist_attributes = false
-    end
-
     # This was used to break devise in some situations
     config.to_prepare do
       Devise::SessionsController.layout "application"
diff --git a/test/rails_app/lib/shared_user.rb b/test/rails_app/lib/shared_user.rb
index 29c26231..e4bd8712 100644
--- a/test/rails_app/lib/shared_user.rb
+++ b/test/rails_app/lib/shared_user.rb
@@ -7,7 +7,6 @@ module SharedUser
            :trackable, :validatable, :omniauthable
 
     attr_accessor :other_key
-    attr_accessible :username, :email, :password, :password_confirmation, :remember_me, :confirmation_sent_at
 
     # They need to be included after Devise is called.
     extend ExtendMethods
diff --git a/test/test_models.rb b/test/test_models.rb
index fb65d53c..cd7fbaa3 100644
--- a/test/test_models.rb
+++ b/test/test_models.rb
@@ -15,7 +15,6 @@ end
 class UserWithVirtualAttributes < User
   devise :case_insensitive_keys => [ :email, :email_confirmation ]
   validates :email, :presence => true, :confirmation => {:on => :create}
-  attr_accessible :email, :email_confirmation
 end
 
 class Several < Admin