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Passive Cryptanalysis of the UnConditionally Secure Authentication Protocol for RFID Systems

Abyaneh, Mohammad Reza Sohizadeh
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Passive Cryptanalysis of the UnConditionally.pdf (232.6Kb)
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https://hdl.handle.net/1956/6109
Date
2012
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  • Department of Informatics [541]
Abstract
Recently, Alomair et al. proposed the first Un- Conditionally Secure mutual authentication protocol for lowcost RFID systems(UCS-RFID). The security of the UCSRFID relies on five dynamic secret keys which are updated at every protocol run using a fresh random number (nonce) secretly transmitted from a reader to tags. Our results show that, at the highest security level of the protocol (security parameter= 256), inferring a nonce is feasible with the probability of 0.99 by eavesdropping(observing) about 90 runs of the protocol. Finding a nonce enables a passive attacker to recover all five secret keys of the protocol. To do so, we propose a three-phase probabilistic approach in this paper. Our attack recovers the secret keys with a probability that increases by accessing more protocol runs. We also show that tracing a tag using this protocol is also possible even with less runs of the protocol.
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International Conference on Information Security and Cryptology (ICISC 2010) in Seoul, Korea.
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