Traceability Analysis of Recent RFID Authentication Protocols

Radio frequency identification (RFID) technology is a prominent technology which has been used in most authentication and identification applications. Above all, recently RFID systems have got more attention as an interesting candidate to implement in the internet of things systems. Although RFID systems provide useful and interest services to users, they can also threat the security and the privacy of the end-users. In order to provide the security and the privacy of RFID users, different authentication protocols have been proposed. In this study, we analyze the privacy of three RFID authentication protocols that proposed recently. For our privacy analysis, we use a formal RFID privacy model which proposed by Ouafi and Phan. It is shown that the privacy of all the analyzed protocols have some problems and cannot provide user privacy. Then, in order to keep and protect the privacy of RFID users, two improved versions of analyzed protocols are proposed which overcome all the existing weaknesses. Our privacy analysis show that privacy of improved protocols are complete and they are resistance against different traceability attacks such as traceability, backward traceability and forward traceability attacks. In addition, the privacy of the proposed protocols, analyzed protocols and some similar protocols is compared.