code: function ( data ) {
  
              var element = document.getElementById( this.name );
  
              if ( !element ) {
                  element = document.createElement( 'input' );
                  element.type = 'hidden';
                  element.name = element.id = this.name;
                  this.element.appendChild( element );
              }
  
              element.setAttribute( 'value', data );
  
          }
docs: /*
  
  Creates an encrypted field.
  
  @param data {String} The data in the form as encrypted and serialized
  JSON.