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Recent developments in the field of network communications have prompted the rise of smart grid research in the United States, China, and South Korea. RFID has become a standard technology within that domain, however many weaknesses in the security of smart grid communication still remain. In this paper we present a lightweight security protocol based on the current standard EPCGlobal Gen2. We also propose an enhanced security scheme for smart grid networks using a protocol based on the One Time Password (OPT) algorithm.