Abstract
Radio frequency identification (RFID) technologies have many advantages in applications such as object tracking and monitoring, ticketing, supply-chain management, contactless payment systems. However, the RFID system may bring about various security and privacy problems. In this paper we present our security analysis of the LAK protocol and the CWH protocol. First, we show that the LAK protocol cannot resist replay attacks, and there- fore an adversary can impersonate a legal tag. Next, we present a full-disclosure attack on the CWH protocol. By sending malicious queries to a tag and collecting the response messages emitted by the tag, the full-disclosure attack allows an adversary to extract the secret information from the tag.
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