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Security and privacy are inherent problems in RFID systems communication. Many different ways and methods were presented to overcome these problems among which encryption, authentication and hardware techniques can be pointed out. Authentication protocols based on elliptic curve cryptography (ECC) is one of the methods used in authentication protocols in order to improve the security and privacy of RFID systems. This study aims at examining and comparing protocols that utilize this method in establishing security. [ABSTRACT FROM AUTHOR]