The construction of secure and private RFID protocols is necessary with the increasing application of RFID technology in increasingly diverse fields. While security refers to unilateral or mutual authentication depending on the protocol, privacy is a more elaborate concept to which many studies and research have been dedicated. Unfortunately, many RFID protocols are still being developed without consistent security and privacy analysis in well-defined models, such as the Vaudenay model. In this paper, we aim to prove that a recently proposed authentication protocol, LRSAS, does not achieve any form of privacy in Vaudenays model.