The authors analyze a recent RFID lightweight authentication protocol, namely EOHLCAP scheme. Based on their analysis, however, a new traceability attack algorithm makes the scheme insecurity, if the attacker has the ability to distinguish the target tag. Some lightweight authentication protocols are susceptible to the similar traceability attack, so they propose a new traceability attack algorithm. More precisely, they also show how their attack algorithm can be applied to the older schemes. To counteract such security issue, they revise the EOHLCAP scheme with the rotation operation and show that the proposed model satisfies the indistinguishability property.