password_confirmation.html.erb

<%= form_tag({controller: "survey_trans", action: "password_confirmation"}, {method: :get}) do |f| %>
<%= text_field_tag :password_confirmation, params[:password_confirmation], class: "form-control", placeholder: "password" %>
<% end %>

survey_trans_controller.rb

class SurveyTransController < ApplicationController
  skip_before_filter :authenticate_user!
  layout "survey"
  def password_confirmation
  end
  
  def survey_form_section
	@survey = Survey.find_by_password(params[:password_confirmation])
  end

  def survey_form
  end
  
  def survey_finish
  end
end