Sorina Ionica ATER at Ecole Normale Supérieure de Paris, Projet CASCADE 45 Rue d'Ulm, 75005, Paris Email: sorina.ionica@m4x.org Office: S7 CRYPTO Level -1 in Aile Rataud Phone: (+33)144322157

Since october 2012 I have been working as an ATER (temporary assistant professor) at the Ecole Normale Supérieure de Paris. During the summer, I will be visiting the Crypto group at Microsoft Research, Redmond, US. I will be working with Kristin Lauter.

I completed my PhD in 2010 at University of Versailles, working under Antoine Joux. After that, I was a post-doc with the TANC group at the Ecole Polytechnique and with the CARAMEL project at Loria, Nancy. You may take a look at my CV.

I work in the area of algorithmic number theory and its applications to cryptography. Lately, I have been focusing on

• the cryptanalysis of pairing-based schemes (such as composite order group protocols ...)
• algorithms and implementation of primitives in curve-based cryptography
• isogeny graphs and endomorphism ring computation for jacobians of genus 2 curves
• computing with Siegel modular forms in genus 3
  
  

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News: I am a member of the program committee of SAC 2013.

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Research

Journal papers :

Sorina Ionica and Antoine Joux, Pairing the Volcano, extended version of the ANTS paper. Added an algorithm for endomorphism ring computation.
Mathematics of Computation, 2013 Article

Sorina Ionica, Pairing-based methods for jacobians of genus 2 curves with maximal endomorphism ring, accepted at the Journal of Number Theory (minor revisions) Article

Publications in international conferences with proceedings :

Sorina Ionica et Antoine Joux, Another Approach to Pairing Computation in Edwards Coordinates in Progress in Cryptography - Indocrypt 2008, volume 5365 of Lectures Notes in Computer Science, pp.400--413, Springer 2008 Article

Sorina Ionica et Antoine Joux, Pairing the Volcano in Proceedings of Algorithmic Number Theory Symposium, volume 6197 of Lectures Notes in Computer Science, pp. 201--218, Springer 2010. Article

Sorina Ionica et Antoine Joux, Pairing computation for elliptic curves with efficiently computable endomorphism and small embedding degree dans Proceedings of Pairing-based Cryptography -Pairing 2010, volume 6487 of Lecture Notes in Computer Science, pp. 435-449, Springer, 2010. Article

Nadia El Mrabet et Aurore Guillevic et Sorina Ionica, Efficient multiplication in finite field extensions of degree 5, dans Progress in Cryptology - AFRICACRYPT 2011 - 4th International Conference on Cryptology in Africa, volume 6737 of Lecture Notes in Computer Science, pp. 188-205, Springer, 2011 Article


Thesis:

I defended my thesis Algorithmique des couplages et cryptographie on the 14th of May 2010.

Preprints

Sorina Ionica and Malika Izabachene, Weak instances of composite order protocols, in preparation

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Invited talks

• "Endomorphism rings of genus 2 jacobians". Invited talk at ECC 2012, Queretaro, Mexico, October 2012
  
• "Pairing-based methods for jacobians of genus 2 curves". Invited talk at Microsoft Research Number Theory Day, Redmond, US, July 2012.

Seminar and contributed talks

Teaching

I was a "moniteur" in Computer Science at Université de Versailles Saint-Quentin

Courses


Python Cours 3 slides.
Fichier test vers.txt.

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Divers

Between 2001 and 2003, I was un undergraduate student of SNSB.

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Date de dernière mise à jour : 11 janvier 2012

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