Kulseng et al. [11], [12] has introduced a RFID lightweight
authentication protocol and two ownership transfer protocols
for RFID systems. The protocols are explained in the next
section in detail. Recently, Kapoor and Piramuthu [10] has
briefly present a de-synchronization attack, in which an adversary
is able to accomplish a DoS attack, to the Kulseng et
al.’s ownership transfer protocol. In this paper, we also provide
other significant attacks on the mutual authentication protocol
and the ownership protocols.