Patient safety through RFID: vulnerabilities in recently proposed grouping protocols.

As RFID-tagged systems become ubiquitous, acceptance of this technology by the general public necessitates addressing related security/privacy issues. The past eight years have seen an increasing number of publications in this direction, specifically using cryptographic approaches. Recently, the Journal of Medical Systems published two papers addressing security/privacy issues through cryptographic protocols. We consider the proposed protocols and identify some existing vulnerabilities.