Jean-François DHEM

Born in Leuven (Belgium), June 26th, 1967
Belgian citizen
Married

Address:
Rue Stroobants 62 / 90
1140 Evere (Brussels)
BELGIUM
Email:
URL: http://users.belgacom.net/dhem

PhD in Applied Sciences (Doctorat en Sciences Appliquées)
Université catholique de Louvain, May 1998

Formation

May 1998:

PhD in Applied Sciences: “Design of an efficient public-key cryptographic library for RISC-based smart cards”, Louvain-la-Neuve, Belgium. Promoter: Professor J.-J. Quisquater.

Jan. 1994:

Intensive course on VHDL digital circuits description language (ARAMIS).

Jun. 1993:

M.S. Thesis : “Conception d'un circuit digital simple, efficace et sécurisé pour jetons et monnaies électroniques”: the “intelligent” telecard using public key cryptography (Zero-knowledge). Promoter: Professor J.-J. Quisquater.

Jun. 1993:

Civil Electrical Engineer UCL (cum laude), Louvain-la-Neuve. Specialization in microelectronics (digital circuit conception) and cryptography.

Professional experience

September 1993 - January 1998: Research assistant at the Microelectronics Laboratory of the catholic University of Louvain (UCL), Belgium, under the direction of Professor J.-J. Quisquater. Founder member of the UCL Crypto Group .

Final design of the SCALPS (Smart Card Applied to Limited Payment Systems) smart card chip as a result of the work carried-out during my M.S. Thesis.
Work in the CASCADE EP 8670 project financed by the European Commission to develop a library of cryptographic functions on the ARM7M RISC 32-bit processor for a new multi-applications smart card chip. Study of various secure protocols needed for this card: the download of applications in the chip, the secure transmission of data using the SMS channel in a GSM network, data compression algorithms for smart cards.
University practical teaching and supervision of M.S. Thesis on cryptography and microelectronics.
Work on his PhD thesis (see http://users.belgacom.net/dhem/these)

February 1998 – May 2000: Belgacom (Belgian main telecom operator), Belgium.

Feb. ’98 – Feb. ’99 : IT Security & Payment Applications Engineer for the Belgacom Multimedia & Infohighways Division. Technical expert of the Public Key Infrastructure (PKI) team.
Feb. ’99 – May ’00: IT Security Operations Project Manager for the Belgacom Data Networks and Applications Division. Operations project manager of the Belgacom E-Trust PKI.

June 2000 – March 2006: Gemplus (World smart card leader manufacturer), France.

Jun. ’00 – Dec. ’01: Researcher in the Card Security Group, part of the Security Technology Department in the R&D Software Division.
Jan. ’02 – Nov. ’03: Cryptographic Hardware Activities Manager in the Card Security Group.
Dec ’03 – Mar. '06: Head of the Cryptography & Security Engineering Group in which all the secure & cryptographic libraries embedded in smart cards for Gemplus worldwide are developed.

March 2006 – Today: Banksys, Belgium.

Security Consultant.

Particular knowledge in Computer Science

Microprocessor architecture (ALU, data-path, new/modified instructions to namely improve cryptographic applications);
Operating Systems: Unix (Solaris, Linux, BSD), MacOS 8/9/X (including small applications development), Windows NT/2000/XP;
Programming languages: various 32-bit RISC assembly languages (e.g. ARM, MIPS), C, Java, Pascal, Fortran, VHDL, Mathematica^TM, GP-Pari, LaTeX, HTML (Former Webmaster of the UCL Crypto Group).

Languages

French (mother tongue);
Dutch: usual;
English: very good understanding and good speaking.

Annexes

Communications to scientific meetings

Mons, Belgium, Mar. 22nd, 1994. “Microelectronics meetings”, organized by the ARAMIS Association, in the framework of the week of the technology. Presentation of a poster on the first results on the chip conceived during our MsThesis.
Lille, France, Oct. 24-26, 1994. Presentation of the paper: “SCALPS: Smart Card Applied to Low Payment Systems” at Cardis '94 (First smart card research and advanced application conference).
Saint Malo, France, May 21-25, 1995. Participation to EUROCRYPT '95: International Conference on Cryptology. Demonstration of the use of the SCALPS chip and presentation of a Poster on the CASCADE project.
Santa Barbara, CA, USA, Aug. 27-31, 1995. Participation to CRYPTO '95: International Conference on Cryptology. Presentation of the CASCADE project and the first results on cryptography during the rump session of August 29th.
Amsterdam, The Netherlands, Sept. 16-18, 1996. Participation to CARDIS 1996. Presentation of J.-F. Dhem, J.-J. Quisquater and R. Lecat: “Lossless Compression Algorithms for Smart Cards: A Progress Report”.
Louvain-la-Neuve, Belgium, Sep. 14-16, 1998. Participation to CARDIS 1998. Presentation of J.-F. Dhem: “Recent Results on Modular Multiplications for Smart Cards”.
Austin, TX, USA, Sep. 23-26, 2001. Participation to ICCD (IEEE International Conference on Computer Design) 2001. Invited talk on “Design Constraints for Efficient Cryptographic Processing in Smart Cards”.

Publications

J.-F. Dhem and D. Veithen, Conception d'un circuit digital simple, efficace et sécurisé pour jetons et monnaies électroniques, Master's thesis, Université catholique de Louvain - Faculté des Sciences Appliquées - Laboratoire de microélectronique, Louvain-la-Neuve, Jun. 1993.
J-F Dhem, D. Veithen and J.-J. Quisquater, SCALPS: Smart Card Applied to Limited Payment Systems , In IEEE Micro Magazine , Vol. 16, No. 3, pp. 42-51, Jun. 1996. (Also available as a technical note )
J.-F. Dhem and J.-J. Quisquater, Lossless Compression Algorithms for Smart Cards: A progress report , In Future Generation computer systems (FGCS) , Vol. 13, pp. 27-28, Elsevier, 1997.
J.-F. Dhem, M. Joye and J.-J. Quisquater, Normalization in diminished-radix modulus transformation , In Electronics Letters, Vol. 33, No. 23, Nov. 1997.
P. Biget, P. Paradinas (GEMPLUS) and J.-F. Dhem (UCL), CASCADE: A Smarter Chip for Smart Cards, In Advances in Information Technologies: The Business Challenge (edited by J.-Y. Roger, B. Standford and P. T. Kidd), IOS Press, pp.716-723, Nov. 1997.
J.-F. Dhem, Design of an efficient public-key cryptographic library for RISC-based smart cards, PhD thesis , Université catholique de Louvain - Faculté des Sciences Appliquées - Laboratoire de microélectronique, Louvain-la-Neuve, May 1998.
J.-F. Dhem, F. Koeune, P.-A. Leroux, P. Mestré, J.-J. Quisquater and J.-L. Willems, A Practical Implementation of the Timing Attack, In Proc. of CARDIS 98 - Third smart card research and advanced application conference , UCL, Louvain-la-Neuve, Belgium, (edited by J.-J. Quisquater and B. Schneier), vol. 1820 of Lectures Notes in Computer Science, pp 167-182, Springer, 1998. (Also available as a technical note )
J.-F. Dhem, Recent Results on Modular Multiplications for Smart Cards , In Proc. of CARDIS 98 - Third smart card research and advanced application conference, UCL, Louvain-la-Neuve, Belgium, (edited by J.-J. Quisquater and B. Schneier), vol. 1820 of Lectures Notes in Computer Science, pp 336-352, Springer, 1998.
J.-F. Dhem and N. Feyt, Hardware and Software Symbiosis Helps Smart Card Evolution , In IEEE Micro Magazine, Vol. 21, No. 6, pp. 14-25, Nov/Dec 2001.
J-.F. Dhem, Efficient Modular Reduction Algorithm in F_q[x] and its Application to “Left to Right” Modular Multiplication in F₂[x], In Proc. of Workshop on Cryptographic Hardware and Embedded Systems - CHES 2003, Köln , (edited by C.D. Walter, Ç.K. Koç and C. Paar), vol. 2779 of Lectures Notes in Computer Science, Springer, 2003

Miscellaneous

Author and co-author of several Patents in the domain of Cryptography and Computer Architecture.
Contributor to the IEEE Standard Specifications for Public-Key Cryptography - p1363-2000, IEEE, USA, 2000.

Last update: May, 2006

May 1998:	PhD in Applied Sciences: “Design of an efficient public-key cryptographic library for RISC-based smart cards”, Louvain-la-Neuve, Belgium. Promoter: Professor J.-J. Quisquater.
Jan. 1994:	Intensive course on VHDL digital circuits description language (ARAMIS).
Jun. 1993:	M.S. Thesis : “Conception d'un circuit digital simple, efficace et sécurisé pour jetons et monnaies électroniques”: the “intelligent” telecard using public key cryptography (Zero-knowledge). Promoter: Professor J.-J. Quisquater.
Jun. 1993:	Civil Electrical Engineer UCL (cum laude), Louvain-la-Neuve. Specialization in microelectronics (digital circuit conception) and cryptography.