The blocker tag: selective blocking of RFID tags for consumer privacy
Proceedings of the 10th ACM conference on Computer and communications security
A Secure and Efficient RFID Protocol that could make Big Brother (partially) Obsolete
PERCOM '06 Proceedings of the Fourth Annual IEEE International Conference on Pervasive Computing and Communications
Dynamic Key-Updating: Privacy-Preserving Authentication for RFID Systems
PERCOM '07 Proceedings of the Fifth IEEE International Conference on Pervasive Computing and Communications
Providing Security and Privacy in RFID Systems Using Triggered Hash Chains
PERCOM '08 Proceedings of the 2008 Sixth Annual IEEE International Conference on Pervasive Computing and Communications
Noisy tags: a pretty good key exchange protocol for RFID tags
CARDIS'06 Proceedings of the 7th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Applications
RFID traceability: a multilayer problem
FC'05 Proceedings of the 9th international conference on Financial Cryptography and Data Security
RFID guardian: a battery-powered mobile device for RFID privacy management
ACISP'05 Proceedings of the 10th Australasian conference on Information Security and Privacy
Backward channel protection method for RFID security schemes based on tree-walking algorithms
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part IV
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In this paper, we introduce a cross-layer framework for enhancing privacy in RFID systems. The framework relies on mechanisms in the physical (PHY) layer, as well as the medium access control (MAC) layer, to provide flexible protection over the unique identifiers of low-cost RFID tags. Such a framework prevents adversaries and malicious parties from tracking RFID tags through the monitoring of their unique identifiers. More specifically, our framework relies on masking of the identifier at the PHY layer, whereby bit-collisions are induced between the backscattered tag identifier and a protective mask, such that a legitimate reader can be allowed to recover the tag identifier but an illegitimate party would not be able to do so. To strengthen the level of protection provided by the bit-collision masking method, we present the randomized bit encoding scheme that is used in our framework. In addition, we also incorporate mechanisms in the MAC layer, and make use of cross-layer interactions between the MAC and the PHY layers to provide flexible privacy protection. This allows tags that do not require privacy protection to be read conveniently while allowing tags that need to be protected to stay protected.