Home Research Education Publications Activities Resources About Me

Teaching and supervision

Contents: | Assignments | Courses |


I'm happy to supervise any students wishing to graduate in the area of privacy, identity management, applied cryptography. I maintain a separate page with student guides.

Current assignments

  • Nina Boelsums (TU/e Industrial Design), [feb 2018 - dec 2018]
  • "Identifying guard nodes of Tor hidden sedrvices", Maarten Dorrestijn (Bac), [dec 2018 - now]
  • "Blockchains for post-trade settlement and clearing of securities", Sven Arissen, [aug 2018 - now]


A popular option is to perform the graduation project as an intern at a company. For example:

Open assignments

Please contact me to discuss a suitable project. External projects are certainly a possibility. The following list of project summaries give you an idea of the kind of assignments that are currently open.
Parallel transaction application to the blockchain state.
It is common to apply transactions sequentially because it allows to simply discard problems such as double-spending, but when the topic goes beyond financial area it is often theoretically possible to execute transactions in parallel if transactions alter provably mutually independent parts of the state. The scope of this problem is to design a scheduling algorithm addressing parallel and consequent transaction application assuming a set of transactions is fixed. The optimality criterium here is a throughput maximization. On the practical side one will have an opportunity to try implement this scheduling algorithm for the Exonum framework.

This is a project for Bitfury Group, based in Amsterdam. Details to be negotiated, as they do not have space at the moment to make this a real internship.

Real applications of blockchain technology
Compile a list of real life applications of blockchain technology (i.e. those that are beyond the proof-of-concept stage and are really tried or applied in practical situations. Investigate which blockchain technnoloogy they use, and how exactly. Analyse them to determine their key security, privacy and performance properties.
UbiKiMa is a ubiquitous key management app for Android. It is a password manager for existing websites, but also allows public key based authentication on websites that support it. The app is still a rough prototype, that could be polished considerably. Also the underlying protocols could do with an analysis and probably some improvements. I am looking for a student that can do all of this...
Efficient implementations of Attribute Based Credentials
Out group has implemented Idemix credentials on smart cards in the Irma project. We are developing a new cryptographic scheme for such attribute based credentials that promise to be much more efficient while being also much more secure. The goal of this assignment is to implement the proposed scheme and analyse it.
Privacy Coach
Think of ways how you can use a mobile device to protect your privacy...
Strengthening the binding between people and their on-line credentials.
Within the IRMA project, we are developing a platform for attribute based credentials, where the credentials are stored on a smart card. Credentials are personal, and it should be impossible to use the credential of someone else (your older brother for instance) to buy age restricted material on line. Currently, we use PIN codes to prevent this. But this is weak if your brother is happy to share his PIN with you. Goal of this project is to study ways to bind credentials to individuals, and to think of new ways to make this binding stronger.
Privacy by design
Investigate the concept of privacy design patterns: what should such a pattern contain, what patterns have been described so far, for which privacy design problems are design patterns mostly missing. Define a your own set of privacy design patterns.


I teach the following courses Both courses are part of the TRU/e security master.

I, and other people in our group, sometimes teach a cryptography and security lab for high-school students.

Finished assignments

The following assignments were finished under my supervision.
  • Decentralized attribute-based encryption for DECODE, Marloes Venema, [feb-aug 2018]. (thesis).
  • Long term data storage using peer-to-peer technology, Paulus Meessen [feb-aug 2017]
  • An Analysis of the security & privacy qualities of a proposal for the Dutch eID scheme, Jorrit de Boer, [feb 2015 - oct 2016]
  • Technology and the right to be forgotten, Mark Vijfvinkel [sep 2014-feb 2015]
  • Exchanging threat information between semi - honest parties, Anton Jongsma [sep 2014-feb 2015]
  • Technical aspects of a right to be forgotten, Stan Philisen [feb 2014-jul 2014].
  • Active website fingerprinting in Tor, Max Hovens [feb 2014 - aug 2014]
  • Attribute Based Encryption using Attribute Based Credentials, Tim v.d. Kamp [feb 2014 - aug 2014]. (thesis)
  • Delegation in Attribute Based Credentials, Manu Drijvers [feb 2014 - jul 2014]. (thesis).
  • DigiD vs. JavaScript: the risk of using third party JavaScript on government websites, Koen Buitenhuis, [mar 2013 - aug 2013]. (thesis)
  • Cookiewalls. Een probleem met een technische oplossing?, Koen van Ingen, [mar 2013 - jul 2013]. (thesis)
  • Effective Host-based Intrusion Detection for Systems with Real-Time Constraints, Pol van Aubel, at TENNET Arnhem, [mar 2013 - sept 2013].
  • Providing unlinkability of transactions with a single token in U-Prove, Erik Weitenberg (RuG), at TNO Groningen [sept 2011 - may 2012]. (thesis)
  • Self-blindable credentials with revocation, Wouter Luuks (RuG), at TNO Groningen [aug 2010 - apr 2011].
  • Hacking the Mifare Classic, Gerhard de Koning Gans, [feb 2007 - jun 2008].
  • Smartcard-integratie in het pseudoniemsysteem idemix, Luuk Danes, at TNO Groningen, [dec 2006 - jul 2007]. (thesis)
  • Privacy policies voor software, Leon Krol, [feb 2006 - aug 2006].
  • End-To-End Application Security Using Trusted Computing by Michiel Broekman at Oxford University Computing Laboratory [Jan 2005 - Aug 2005].
  • Security of Web Services by Robert-Jan Boezeman at Oxford University Computing Laboratory [Jan 2003 - Aug 2003]. Winner of the Aia Thesis Award 2003
  • UMTS Mobile Financial Services Security by Yan Yijun at ABN AMRO.
  • JAVA Cards as Secure Object Store by Richard Brinkman.
  • SPAM Filter Analysis by Jeroen van Nieuwenhuizen.
  • Implementing Multi Level Security using a plublic key infrastructure by Edward Stempel at Philips Crypto.
  • OCCAMM Security Assessment by Paul Alexander at KPN Research.

Last Version -
(Note: changeover from CVS to dotless svn version numbers on Jan 19, 2008, and changeover to GIT versioning on May 30, 2013.)
Maintained by Jaap-Henk Hoepman
Email: jhh@cs.ru.nl