Decentralized authorization with ECDSA on a Java smart card
Proceedings of the fourth working conference on smart card research and advanced applications on Smart card research and advanced applications
Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy
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SP '09 Proceedings of the 2009 30th IEEE Symposium on Security and Privacy
Developing efficient blinded attribute certificates on smart cards via pairings
CARDIS'10 Proceedings of the 9th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Application
Anonymous ticketing for NFC-Enabled mobile phones
INTRUST'11 Proceedings of the Third international conference on Trusted Systems
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In this paper we report on the performance of the RSA variants of Brands protocols for zero-knowledge proof and restrictive blinded issuing . The performance is relatively bad: For 4 attributes and an RSA key size of 1280 bits, blinded issuing takes about 10 seconds and the zero-knowledge proof takes about 9 seconds. For 2 attributes the zero-knowledge proof drops to 5 seconds. The poor performance comes from the fact that the cryptographic coprocessor on the Java card can only be employed in very limited ways. With appropriate support of the cryptographic coprocessor both protocols would run much faster.