Analysis of power constraints for cryptographic algorithms in mid-cost RFID tags

Authors:
Tobias Lohmann;Matthias Schneider;Christoph Ruland
Affiliations:
Institute for Data Communication Systems, University of Siegen, Siegen, Germany;Institute for Data Communication Systems, University of Siegen, Siegen, Germany;Institute for Data Communication Systems, University of Siegen, Siegen, Germany
Venue:
CARDIS'06 Proceedings of the 7th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Applications
Year:
2006

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Abstract

Radio Frequency Identification (RFID) systems can be found in wide spread applications – from simple theft prevention over multi bit transponders up to complex applications involving contactless smartcards. This paper shows that the security gap between low-cost RFID Tags that only provide simple security features and contactless smartcards can be filled. It is examined how much energy a passive tag can gain from a magnetic field and which amount is needed by basic logic functions. The gate-equivalents of several cryptographic operations are then compared with the available energy and a conclusion is drawn if they are feasible for RFID tags.