diff --git a/app/models/site/social_distributed_press.rb b/app/models/site/social_distributed_press.rb
index 9d283103..5d469f03 100644
--- a/app/models/site/social_distributed_press.rb
+++ b/app/models/site/social_distributed_press.rb
@@ -7,6 +7,17 @@ class Site
 
     included do
       encrypts :private_key_pem
+
+      before_save :generate_private_key_pem!, unless: :private_key_pem?
+
+      private
+
+      # Genera la llave privada y la almacena
+      #
+      # @return [nil]
+      def generate_private_key_pem!
+        self.private_key_pem ||= DistributedPress::V1::Social::Client.new(public_key_url: nil, key_size: 2048).private_key.export
+      end
     end
   end
 end