Disclaimer: This page refers to former member of the group. Validity or accuracy of the following information is thus not guaranteed in any way.
I've made my PhD in Orange Labs at Caen. My main topic was the private authentication in the RFID world. More precisely, I was interested in the devlopment of a security model and the conception of new private and efficient authentication protocol.
Now, I work in the Crypto Group of the UCL. I still work on RFID but also for the SEE project. This latter concerns the Belgium eID card and its applications.
| Address: | Microelectronics Laboratory, Place du Levant, 3 |
| Office: | b.127.20 |
| Voice: | +32 (0) 10 47 81 39 |
| Fax: | +32 (0) 10 47 25 98 |
Seminars given
October 22, 2009 - Server-Aided Cryptography for Anonymity
by Dr. Iwen Coisel
| Abstract: | Portable devices (mobile phones, smart cards, ...) are very useful to access services from anywhere. However, when authentication protocols require complex cryptography, implying costly mathematical operations, these devices may become inadequate because of their limited capabilities. This is in particular the case when the device must remain anonymous and unlinkable w.r.t. the service provider since it implies the use of complex cryptographic tools. In this presentation, I introduce the concept of server-aided cryptography for anonymity by adding a powerful intermediary which helps the restricted device in its cryptographic computations. I first give a general server-aided model in this setting, which model can be applied to several cryptographic tools: group, blind and ring signatures. I present the server-aided protocol for the zero-knowledge proof of knowledge of a generic discrete logarithms relations set. Then, I expose the best secure and efficient server-aided variants of several well-known constructions |
Publications
Sébastien Canard, Iwen Coisel, Julien Devigne, Cécilia Gallais, Thomas Peters, and Olivier Sanders. Toward Generic Method for Server-Aided Cryptography, In S. Qing & J. Zhou, editor(s), International Conference on Information and Communications Security - ICICS 2013, Lecture Notes in Computer Science, Springer, November 2013 BibTeX
Sébastien Canard, Iwen Coisel, Giacomo de Meulenaer, and Olivier Pereira. Group Signatures are Suitable for Constrained Devices, ICISC 2010, Lecture Notes in Computer Science (LNCS), Springer, December 2010 PDF BibTeX
Sébastien Canard, Iwen Coisel, Jonathan Etrog, and Marc Girault. Privacy-Preserving RFID Systems: Model and Constructions, In Cryptology ePrint Archive, July 2010 PDF BibTeX
Sébastien Canard, Iwen Coisel, and Marc Girault. Security of Privacy-Preserving RFID Systems, IEEE International Conference on RFID-Technology and Applications -- RFID-TA'10, pages 269--274, IEEE, June 2010 BibTeX
Gildas Avoine, Iwen Coisel, and Tania Martin. Time Measurement Threatens Privacy-Friendly RFID Authentication Protocols, In S.B. Ors Yalcin, editor(s), Workshop on RFID Security -- RFIDSec'10, Volume 6370 of Lecture Notes in Computer Science (LNCS), pages 138--157, Spinger, June 2010 PDF BibTeX
Sébastien Canard, Iwen Coisel, and Jonathan Etrog. Lighten Encryption Schemes for Secure and Private RFID Systems, In Radu Sion, Reza Curtmola, Sven Dietrich, Aggelos Kiayias, Josep M. Miret, Kazue Sako, Francesc Sebé, editor(s), Financial Cryptography Workshops, Volume 6054 of Lecture Notes in Computer Science (LNCS), pages 19 - 33, Spinger, January 2010 PDF BibTeX
Sébastien Canard, and Iwen Coisel. Data Synchronization in Privacy-Preserving RFID Authentication Schemes, Workshop on RFID Security -- RFIDSec'08, July 2008 PDF BibTeX
Iwen Coisel, Sébastien Canard, and Jacques Traoré. Complex Zero-Knowledge Proofs of Knowledge Are Easy to Use, In Willy Susilo, Joseph K. Liu, Yi Mu, editor(s), ProvSec, Volume 4784 of Lecture Notes in Computer Science (LNCS), pages 122 - 137, Springer, November 2007 PDF BibTeX
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