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Unidirectional Key Distribution Across Time and Space with Applications to RFID Security

10 years 27 days ago
Unidirectional Key Distribution Across Time and Space with Applications to RFID Security
We explore the problem of secret-key distribution in unidirectional channels, those in which a sender transmits information blindly to a receiver. We consider two approaches: (1) Key sharing across space, i.e., via simultaneously emitted values that may follow different data paths and (2) Key sharing across time, i.e., in temporally staggered emissions. Our constructions are of general interest, treating, for instance, the basic problem of constructing highly compact secret shares. Our main motivating problem, however, is practical key management in RFID (Radio-Frequency IDentification) systems. We describe the application of our techniques to RFID-enabled supply chains and a prototype privacy-enhancing system.
Ari Juels, Ravikanth Pappu, Bryan Parno
Added 02 Oct 2010
Updated 02 Oct 2010
Type Conference
Year 2008
Where USS
Authors Ari Juels, Ravikanth Pappu, Bryan Parno
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