Cryptography Research Group

This is the homepage of the cryptography research group in the Institute of Computer Science in the Faculty of Science and Technology at the University of Tartu. The group consists in two smaller groups, the Quantum Cryptography group led by Dominique Unruh, and the Cryptographic Protocols group led by Helger Lipmaa.

The cryptography group conducts research into cryptography, in particular into the following areas:

  • Cryptographic protocol design, including: e-voting, privacy-preserving data mining, secure computation, zero knowledge
  • Cryptographic protocol analysis, symbolic cryptography
  • Quantum cryptography
  • Theory of cryptography

We form part of the Estonian Center of Excellence in Computer Science, an Academic Centre of Excellence in Research in Computer Science.

The group is responsible for the teaching of cryptography, information security, and various parts of theoretical computer science in the Institute of Computer Science. The group is divided into two subgroups:

  • Group of Quantum Cryptography (group of professor Dominique Unruh)
  • Group of Cryptographic Protocols (group of lead researcher Helger Lipmaa)

Main News

  • August 1, 2018: Open Position: Postdoc(s) in Cryptography
    • Helger Lipmaa has several position within a new Horizon 2020 project
  • December 1, 2017: Open Position: Research Fellow in Cryptography
    • Helger Lipmaa has a permanent position in his group
  • November 24-26, 2017: Estonian-Latvian Joint Theory Days is organized in Tartu
  • November 21-28, 2017: Research visit by Bingsheng Zhang
  • November 6-8, 2017: Nordsec 2017 is organized in Tartu
  • November 4-10, 2017: Research visit by Prastudy Fauzi
  • November 7, 2017 (and following Tuesdays): Presentation of student projects in Research Seminar in Cryptography: see schedule
  • October 2017: Our paper "A Subversion-Resistant SNARK" (Behzad Abdolmaleki, Karim Baghery, Helger Lipmaa, Michał Zając) from Asiacrypt 2017 was one of the three papers to be invited to Journal of Cryptology
  • August 2017: Helger Lipmaa the scientific coordinator for University of Tartu of the H2020 European project "PRIViLEDGE" (Privacy-Enhancing Cryptography in Distributed Ledgers), that focuses on Blockchain technology. The project starts from Jan 1, 2018.
  • August 2017: Three papers from University of Tartu were accepted to Asiacrypt 2017
  • June 5, 2017: PhD defense of Jaak Randmets
  • April 12, 2017: Ph.D. defense of Rafik Chaabouni at EPFL. Helger Lipmaa was cosupervisor
  • February 17, 2017: Ph.D. defense of Prastudy Fauzi
  • February 16, 2017: Invited talk by Carla Ràfols
  • October 1, 2016: Helger Lipmaa's group was joined by new MSc student Annabell Kuldmaa
  • April 1, 2016: Helger Lipmaa's group was joined by new PhD students Behzad Abdolmaleki and Karim Baghery
  • March 15, 2016: Invited talk by Kurt Rohloff
  • March 14, 2016: Ph.D. defense of Riivo Talviste
  • From January 1, 2016, we were joined by Michal Zajac (his responsibility is local coordination of the Panoramix project) and Janno Siim.

Academic Staff

Sven LaurHelger LipmaaDominique Unruh


Gelo TabiaMichal Zajac

Research Students

" "
Behzad AbdolmalekiMayuresh AnandKarim BagheryTore Vincent Carstens
Ehsan Ebrahimi TarghiKristjan KripsJanno Siim

Associated Faculty

People who are members of some other research group:

People who work mainly somewhere else:

Industrial PhD students

  • Toomas Krips, Arnis Parsovs, Pille Pullonen, Reimo Rebane

Former staff

  • Ahto Buldas (now professor in Tallinn Technical University), Rafik Chaabouni (now in Pictet), Prastudy Fauzi (now in University of Aarhus), Faruk Gologlu (now in Charles University in Prague), Peeter Laud (now in Cybernetica AS), Margus Niitsoo (Now in Music Education LLC), Jan Willemson (now in Cybernetica AS), Bingsheng Zhang (now in Lancaster University)

Defended PhD theses

  • Helger Lipmaa (1999), Jan Willemson (2002), Margus Niitsoo (2011), Bingsheng Zhang (2011), Dan Bogdanov (2013), Liina Kamm (2015), Riivo Talviste (2016), Prastudy Fauzi (2017), Rafik Chaabouni (2017), Jaak Randmets (2017), Alisa Pankova (2017)

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