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Since our results still cover less than 1/2 of the cipher, they further strengthen our confidence in KATAN-32\'s resistance against differential attacks.
RFID community and an important issue required as to the security of RFID system. Backward privacy means the adversary can not trace the tag later even if he reveals the internal states of the tag sometimes before. In this paper, we analyze two recently proposed RFID authentication schemes: Randomized GPS and Randomized Hashed GPS scheme. We show both of them can not provide backward privacy in Juels and Weis privacy model, which allows the adversary to know whether the reader authenticates the tag successfully or not. In addition, we present a new protocol, called Challenge-Hiding GPS, based on the Schnorr identification scheme. The challenge is hidden from the eavesdropping through the technique of Diffie-Hellman key agreement protocol. The new protocol can satisfy backward privacy, and it has less communication overheads and almost the same computation, compared with the two schemes analyzed.
ABOUT THE CONFERENCE
CRYPTO 2012 is the 32nd International Cryptology Conference. It is sponsored by the International Association for Cryptologic Research (IACR), in cooperation with the Computer Science Department of UCSB. The conference started in 1981 and has attracted a wide international audience from both the academic and industrial communities.
The conference program covers a broad spectrum of topics in cryptology, and it is organized as a 4-day event featuring:
-- two invited talks
-- one tutorial
-- 48 technical presentations
-- "The End of Crypto", by Jonathan Zittrain, Harvard University
-- "Recent Advances and Existing Research Questions in Platform Security", by Ernie Brickell, Intel Corporation
-- "Pinning Down 'Privacy' in Statistical Databases", by Adam Smith, Pennsylvania State University
DETAILED CONFERENCE PROGRAM
With funding support from the NSF and our industry sponsors, we are now able to award a second round of stipends to student attendees, both domestic and international. Application deadline: July 27th, 2012. http://www.iacr.org/conferences/crypto2012/stipends-2012.html
CRYPTO 2012 SPONSORS
Google, Microsoft Research, Qualcomm, RIM, Voltage Security