code: private void readObject(java.io.ObjectInputStream s)
          throws java.io.IOException, ClassNotFoundException
      {
          s.defaultReadObject();
          if (encryptedContent != null)
              encryptedContent = encryptedContent.clone();
          if (encodedParams != null)
              encodedParams = encodedParams.clone();
      }
docs: Restores the state of the SealedObject from a stream.
  @param s the object input stream.
  @exception NullPointerException if s is null.