부산대학교 도서관

The widespread use of Radio Frequency Identification (RFID) technologies help to trace a large number of commodity and share the tag information in the supply chain system. However, many ownership transfer protocols are subject to various attacks. We analyze the security of two protocols. Even if the designers claim that their protocols are security, we find that their schemes suffer from forward traceability attacks and tracing attacks. In addition, we show that a weak attacker can retrieve the secrets of the tag with a probability 1 in Kardaş et al.’s protocol. To resist against these attacks, we present an improved scheme based on Kardaş et al.’s protocol by adopting the new key-update mechanism. In the end, we show the enhanced versions provides the forward and backward untraceable security properties.