Nils Fleischhacker

I am a fourth year Ph.D. student in Computer Science at Saarland University and a member of the Cryptographic Algorithms group.

Curriculum Vitae (short)

since 2012Ph.D. student in Computer Science with Dominique Schröder at Saarland University
Jul - Sep 2015Research Intern with Christina Brzuska at Microsoft Research Cambridge
2010 - 2012M.Sc. in Computer Science, TU Darmstadt
2007 - 2010B.Sc. in Computer Science, TU Darmstadt

Research Interests

  • Foundations of Cryptography
  • Provable Security
  • Black-Box Impossibilities
  • Cryptographic Protocols

Publications

Efficient Cryptographic Password Hardening Services From Partially Oblivious Commitments (to appear)
Jonas Schneider, Nils Fleischhacker, Dominique Schröder, Michael Backes
23rd ACM Conference on Computer and Communications Security (CCS 2016), October 2016.

On Statistically Secure Obfuscation with Approximate Correctness[Full Version]
Zvika Brakerski, Christina Brzuska and Nils Fleischhacker
36th International Cryptology Conference (CRYPTO 2016), Lecture Notes in Computer Science, Volume 9815, pp. 551-578, Springer-Verlag, August 2016.

Two Message Oblivious Evaluation of Cryptographic Functionalities
Nico Doettling, Nils Fleischhacker, Johannes Krupp, and Dominique Schröder
36th International Cryptology Conference (CRYPTO 2016), Lecture Notes in Computer Science, Volume 9816, pp. 619-648, Springer-Verlag, August 2016.

Efficient Unlinkable Sanitizable Signatures from Signatures with Re-Randomizable Keys [Full Version]
Nils Fleischhacker, Johannes Krupp, Giulio Malavolta, Jonas Schneider, Dominique Schröder, and Mark Simkin
19th International Conference on the Theory and Practice of Public-Key Cryptography (PKC 2016), Lecture Notes in Computer Science, Volume 9614, pp. 301-330, Springer-Verlag, March 2016.
The original publication is available at link.springer.com.

A Framework for Multi-Factor Authentication and Key Exchange [Full Version]
Nils Fleischhacker, Mark Manulis, and Amir Azodi
1st International Conference on Research in Security Standardisation (SSR 2014), Lecture Notes in Computer Science, Volume 8893, pp. 190-214, Springer-Verlag, December 2014.
The original publication is available at link.springer.com.

On Tight Security Proofs for Schnorr Signatures [Full Version]
Nils Fleischhacker, Tibor Jager, and Dominique Schröder
20th Annual International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT 2014), Lecture Notes in Computer Science, Volume 8873, pp. 512-531, Springer-Verlag, December 2014.
The original publication is available at link.springer.com.

Feasibility and Infeasibility of Secure Computation with Malicious PUFs
Dana Dachman-Soled, Nils Fleischhacker, Jonathan Katz, Anna Lysyanskaya, Dominique Schröder
34th International Cryptology Conference (CRYPTO 2014), Lecture Notes in Computer Science, Volume 8617, pp. 405-420, Springer-Verlag, August 2014.
The original publication is available at link.springer.com.

Limitations of the Meta-Reduction Technique: The Case of Schnorr Signatures [Full Version]
Marc Fischlin and Nils Fleischhacker
32nd Annual International Conference on the Theory and Applications of Cryptographic Techniques (EUROCRYPT 2013), Lecture Notes in Computer Science, Volume 7881, pp. 444-460, Springer-Verlag, May 2013.
The original publication is available at link.springer.com.

Pseudorandom Signatures [PDF] [Full Version]
Nils Fleischhacker, Felix Günther, Franziskus Kiefer, Mark Manulis, and Bertram Poettering
8th ACM Symposium on Information, Computer and Communications Security (ASIACCS 2013), May 2013.
The original publication is available at dl.acm.org.

SDF - Solar-Aware Distributed Flow in Wireless Sensor Networks [PDF]
Immanuel Schweizer, Nils Fleischhacker, Max Mühlhäuser, and Thorsten Strufe
36th IEEE Conference on Local Computer Networks (LCN 2011), October 2011.
The original publication is available at ieeexplore.ieee.org.

Talks

On Statistically Secure Obfuscation with Approximate Correctness [PDF]
August 15, 2016 at CRYPTO 2016 (Santa Barabara, CA, USA).

Efficient Unlinkable Sanitizable Signatures from Signatures with Re-Randomizable Keys [PDF]
March 7, 2016 at PKC 2016 (Taipei, Taiwan).

On Tight Security Proofs for Schnorr Signatures [PDF]
December 9, 2014 at ASIACRYPT 2014 (Kaohsiung, Taiwan).

Feasibility and Infeasibility of Secure Computation with Malicious PUFs [PDF]
August 21, 2014 at CRYPTO 2014 (Santa Barabara, CA, USA).

Limitations of the Meta-Reduction Technique: The Case of Schnorr Signatures [PDF]
May 29, 2013 at EUROCRYPT 2013 (Athens, Greece).

Other Research Activities

Aug - Sep 2013Research visit at the University of Maryland, College Park, USA with Jonathan Katz and Dana Dachman-Soled
Feb - Dec 2015Collaboration in the project "Group Signatures: Privacy-Preserving Authentication Methods", a survey for the BSI (German Federal Office for Information Security), of the Cryptographic Protocols Group at Technische Universität Darmstadt.
The resulting survey can be found at bsi.bund.de.

Review Activities

I have served as an external reviewer for the following conferences:

  • ACNS 2013, 2014, 2015
  • CANS 2016
  • CRYPTO 2016
  • Eurocrypt 2015
  • FC 2014
  • ICISC 2015
  • IMACC 2013
  • IWSEC 2016
  • PKC 2015, 2016
  • ProvSec 2016
  • SCN 2014
  • TCC 2016-A, 2016-B
  • UBICOMP 2016
  • WeWoRC 2013
I am also happy to have served as a reviewer for the IEEE Transactions on Computers.

Teaching

  • Winter Term 2013/2014: Teaching Assistant for the Seminar on Cloud Security at Saarland University
  • Winter Term 2013/2014: Teaching Assistant for the Core Lecture Cryptography at Saarland University
  • Summer Term 2013: Teaching Assistant for Cryptographic Protocols at Saarland University
  • Winter Term 2012/2013: Teaching Assistant for Public Key Encryption at Saarland University
  • Winter Term 2011/2012: Teaching Assistant for Introduction to Cryptography at TU Darmstadt

Nils Fleischhacker

Nils Fleischhacker, M.Sc.

Nils Fleischhacker
Saarland University
Campus E9 1, Room 1.10
66123 Saarbrücken

fleischhacker[DELETE-THIS]@cs.uni-saarland.de

Saarland University
Department of Computer Science

CISPA