| As the Radio Frequency Identification (RFID) technology becomes more pervasively used to conveniently identify objects around us, privacy concerns become more significant. Specifically, when the ownership of an RFID tag is transferred from one owner to another, the forward and backward security must be preserved. The private information of the previous owner must not be exposed to the current owner and, reversibly, the information of the current owner must not be exposed to the previous owner.;The power-based transfer-of-ownership protocol presented in this thesis provides the capability to change the power-based e-fingerprint of an RFID tag, thus providing each owner with a unique e-fingerprint. The power-based e-fingerprint changing process is based on the impact of transistor size on the power consumption of the CMOS circuits on the tag. The forward and backward security is preserved because only the current owner knows the current e-fingerprint of the RFID tag, and he/she has no knowledge of other e-fingerprints of the tag. |
