 key, seed: %d.", seed)  }   params, err = generateMessageParams()  if err != nil {   t.Fatalf("failed generateMessageParams with seed %d: %s.", seed, err)  }  msg, err = NewSentMessage(params)  if err != nil {   t.Fatalf("failed to create new message with seed %d: %s.", seed, err)  }  params.KeySym = 