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Recently, a universally composable framework for RFID authentication protocols providing availability, anonymity, and authenticity was proposed. In this paper we extend that framework to address forward-security issues in the presence of key compromise.We also introduce new, provably secure, and highly practical protocols for anonymous authentication and(More)
This paper examines two unlinkably anonymous, simple RFID identification protocols that require only the ability to evaluate hash functions and generate random values, and that are provably secure against Byzantine adversaries. The main contribution is a universally composable security model tuned for RFID applications. By making specific setup,(More)
As the number of RFID applications grows, concerns about their security and privacy become greatly amplified. At the same time, the acutely restricted and cost-sensitive nature of RFID tags rules out simple reuse of traditional security/privacy solutions and calls for a new generation of extremely lightweight identification and authentication protocols. (More)
While it is known previously that the cycle lengths of individual components of the AES round function are very small, we demonstrate here that the cycle length of the S-box combined with the ShiftRow and MixColumn transformation is at least 10 205. This result is obtained by providing new invariances of the complete AES round function without the key(More)
Many ad hoc routing algorithms rely on broadcast flooding for location discovery or, more generally, for secure routing applications. Flooding is a robust algorithm but because of its extreme redundancy, it is impractical in dense networks. Indeed in large wireless networks, the use of flooding algorithms may lead to broadcast storms where the number of(More)
Security and privacy in RFID systems is an important and active research area. A number of challenges arise due to the extremely limited computational, storage and communication abilities of a typical RFID tag. This work describes two families of simple, inexpensive, and untraceable identification protocols for RFID tags. The proposed protocols involve(More)