diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index d8914bc..225e3c4 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -23,9 +23,11 @@ class PostsController < ApplicationController
     @site = find_site
     @lang = find_lang(@site)
     @post = find_post(@site)
+    authorize @post
   end
 
   def new
+    authorize Post
     @site = find_site
     @lang = find_lang(@site)
     @template = find_template(@site)
@@ -36,6 +38,7 @@ class PostsController < ApplicationController
   end
 
   def create
+    authorize Post
     @site = find_site
     @lang = find_lang(@site)
     @template = find_template(@site)
@@ -53,12 +56,17 @@ class PostsController < ApplicationController
     @site = find_site
     @lang = find_lang(@site)
     @post = find_post(@site)
+
+    authorize @post
   end
 
   def update
     @site = find_site
     @lang = find_lang(@site)
     @post = find_post(@site)
+
+    authorize @post
+
     @post.update_attributes(repair_nested_params(post_params))
 
     if @post.save
diff --git a/app/policies/post_policy.rb b/app/policies/post_policy.rb
new file mode 100644
index 0000000..f3aaba1
--- /dev/null
+++ b/app/policies/post_policy.rb
@@ -0,0 +1,48 @@
+class PostPolicy < SuttyPolicy
+  attr_reader :post
+
+  def initialize(usuarix, post)
+    @usuarix = usuarix
+    @post = post
+  end
+
+  def index?
+    true
+  end
+
+  # Lxs invitadxs solo pueden ver sus propios posts
+  def show?
+    usuaria? || post.author == usuarix.email
+  end
+
+  def new?
+    create?
+  end
+
+  def create?
+    true
+  end
+
+  def edit?
+    update?
+  end
+
+  # Lxs invitadxs solo pueden modificar sus propios artículos
+  def update?
+    usuaria? || post.author == usuarix.email
+  end
+
+  class Scope < SuttyPolicy::Scope
+    # Las usuarias pueden ver todos los posts
+    #
+    # Lxs invitadxs solo pueden ver sus propios posts
+    def resolve
+      return scope if usuaria?
+
+      # Asegurarse que al menos devolvemos []
+      [scope.find do |post|
+        post.author == usuarix.email
+      end].flatten.compact
+    end
+  end
+end