Practical Schemes For Privacy & Security Enhanced RFID

Details Practical Schemes For Privacy & Security Enhanced RFID Practical Schemes For Privacy & Security Enhanced RFID

2009-09-07

arxiv.org/abs/0909.1257v3

Computer Science

Cryptography and Security

18 pages

Scientific paper

Proper privacy protection in RFID systems is important. However, many of the schemes known are impractical, either because they use hash functions instead of the more hardware efficient symmetric encryption schemes as a efficient cryptographic primitive, or because they incur a rather costly key search time penalty at the reader. Moreover, they do not allow for dynamic, fine-grained access control to the tag that cater for more complex usage scenarios. In this paper we investigate such scenarios, and propose a model and corresponding privacy friendly protocols for efficient and fine-grained management of access permissions to tags. In particular we propose an efficient mutual authentication protocol between a tag and a reader that achieves a reasonable level of privacy, using only symmetric key cryptography on the tag, while not requiring a costly key-search algorithm at the reader side. Moreover, our protocol is able to recover from stolen readers.

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