Zekeriya Erkin

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Zekeriya Erkin

+31 15 27 86283
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Faculty of Electrical Engineering, Mathematics and Computer Science
Intelligent Systems
Mekelweg 4
2628 CD Delft
The Netherlands

Office: HB11.150

I am an assistant professor in the Cyber Security Group, where I work on Privacy Enhancing Technologies. My main research goal is to protect private data in online applications against misuse. One way to achieve this goal is to hide the private data by means of encryption in such a way that without the authorization of the data owner, no one can see the content but still process the encrypted data for the required service. One simple example is to encrypt an image and ask the service provider if there is a face image of a suspect. Since the image is encrypted, there is no way of saying for the service provider. However, it is possible to determine this by running interactive, cryptographic protocols based on Homomorphic Encryption and Secure Multiparty Computation techniques.

Working with encrypted data comes with a price. Since the privacy-sensitive data are encrypted, we face to several challenges such as data expansion, expensive operations on the encrypted data and sophisticated cryptographic protocols that consist of several rounds of communication and heavy computations. Compared to plain version of the same application, the privacy-preserving solution is costly in terms of computation, communication and storage. Hence, in my research, I focus on developing privacy enhanced technologies that are correct, privacy friendly and efficient.

Follow me on Twitter: @ZekiErkin
NEW! RAI cyber security blog that I wrote: link

My talk at PvIB on security aspects of cloud computing.


  • Blockchain and Logistics Innovation, TKI Logistiek, 2016-2018
  • 3TU Big Software on the Run 2015-2019.
  • COMMIT/TheCS: Trusted Healthcare Systems. 2012-2017
  • COMMIT/EWIDS: Extreme Wireless Distributed Sensor Networks. 2012-2017
  • KS: Kindred Spirits. December 2009-December 2012
  • SPEED: Signal Processing in the Encrypted Domain. December 2007-December 2009


  • Computational Privacy, aka Privacy Engineering
  • Secure Signal Processing
    • Secure Multiparty Computation
    • Homomorphic Encryption
    • Differential Privacy
  • Distributed trust: Blockchain. see this link

Interested Research Areas--Privacy Aspects--

  • Processing Sensitive Data
    • Privacy-aware Trusted Healthcare-COMMIT Project
    • Secure Online Social Networks-STW Project
    • Secure Recommender Systems-STW Project
    • Secure Clustering Algorithms-EU Project
    • Privacy-preserving data aggregation in e.g. Smart Grids
  • Distributed Trust
  • Cloud computing: integrity and verifiability, and data privacy
  • Anonymization Techniques for Open Data
  • Emotion Maps for Crowd Management-COMMIT Project

Educational Activities

I have the following educational activities

  • TU Delft, IN4191 Security and Cryptography, head lecturer
  • TU Delft-UTwente, Privacy Enhancing Technologies, co-lecturer

  • TU Delft, IN4253ET Hacking Lab-Applied Security Analyses, co-lecturer
  • TU Delft, TI2730 Data Mining, invited lecturer
  • TU Twente, Cross Cutting Concern “Cyber Security” Module 4-Data and Information
  • TU Twente, Cross Cutting Concern “Cyber Security” Module 6-Interaction
  • TU Delft, EE2511 Stochastic Processes, co-lecturer(2010-2014)

I am also co-organizing the Student Meeting in the department of Intelligent Systems.

For Master and Bachelor Students

Security and Privacy aspects of many application domains are very attractive, full of many research challenges and vital for the further development of the society. There are many research projects available for master and bachelor students. It is suggested to have a high-level understanding in cryptography (there is also a master course IN4191), and programming skills (preferably C/C++). If you are interested in any of the above topics, OR any applied cryptography problem of your liking, please contact me via e-mail.

Interested students can also conduct their research within a company, including but not limited to IBM Amsterdam, IBM ZRL, Riscure, FOX-IT, TNO and Philips, given that the MSc research topic is aligned with the interest of the company.

Current Students

  • Zjijie Ren, Post-doc researcher
  • Majid Nateghizad, Phd candidate, Trusted Healthcare
  • Gamze Tillem, PhD candidate , Secure Software Analysis
  • Chibuike Ugwuoke, PhD candidate, Genomic Privacy
  • Oguzhan Ersoy, PhD Candidate, Blockchain and Logistics
  • Prahesa Kusuma Setia, Rogier Vrooman, Leon Helsloot, Christian Maulany, Ginger Geneste, Mourad el Maouchi, Pieter van der Veeken, MSc Project
  • Hidde Lycklama and Joris Oudejans, Danilo Verhaert, Honour programme

Past Students

  • PhD candidates: Mingxhaou Ma, Dima Kononchuk, Michael Beye
  • MSc: Sjors Hijgenaars, Kris Shrishak, Daniel Mast, Archana Bindu Sunil, Olga Haclikova, Andrei Manta, Henrique Dantas, Ilyaz Nasrullah, Jeroen Prins
  • Honor Programme: Matthijs den Toom, Heming Zhang
  • BSc Projects: Erwin Hoogerwerf

Recent Talks

  • 2017
    • Blockchain: A disruptive Technology (will be) reshaping the world, Cyber Security Academy, June 15, 2017, The Hague, The Netherlands
    • Blockchain: A disruptive Technology reshaping the world, CGI Round Table Meeting, June 8, 2017, Rotterdam Alexander, The Netherlands
    • Processing Biometric Data under Encryption, PI.LAB, March 3, 2017, The Hague, The Netherlands
  • 2016
    • Privacy-preserving Data Aggregation in Smart Cities, IPA Fall Days on Communication, Safety and Privacy in IoT, November 7-11, 2016, Hoog Soeren, The Netherlands
    • Privacy, Who cares and who should care?, Big Data and Privacy, Seaside Matchmaking Event, October 15, 2016, The Hague, The Netherlands
    • Cloud computing: Integrity and Secure Computation, PvIB seminar, 10 March 2016, Zeist, The Netherlands
    • Processing Private Data for Customized Services in Smart Grids, Dagstuhl Seminar on Smart Grid Security and Privacy, 18-20 Jan 2016, Dagstuhl, Germany
  • 2015
    • Cloud Computing: Verification, Integrity and Consistency, The HSD Cafe, 17 Dec 2015, The Hague, The Netherlands
    • Secure Biometric Data Processing, Privacy, Multimedia and Biometrics Workshop, October 6, 2015, Paris, France
    • Recent Advances in Private Data Aggregation, PRETSELS Workshop, September 21-22, Salzburg, Austria
    • Privacy Preserving Data Aggregation Protocols, IBM Zurich Research Lab Talks, July 6, 2015, Zurich, Switzerland
    • Private Data Aggregation for Smart Grids, PETs Day, June 3, 2015, Darmstadt, Germany
    • Privacy Preserving Data Processing, 2nd National Cryptography Workshop, Turkish Academy of Sciences, , April 10-11, 2015, Istanbul, Turkey

Professional Activities

I am also acting as a reviewer for the following journals.

  • IEEE Trans. on Information Forensics and Security, Multimedia, Dependable and Secure Computing, Smart Grid and Signal Processing Magazine
  • ACM Trans. on Information and System Security
  • Elsevier Pervasive and Mobile Computing

Some useful links:

Research Visits

  • Guest Researcher, IBM Zurich Research Lab, May-July, 2015
  • Guest Researcher, University of California, Irvine, August 2012
  • Guest Researcher, Aarhus University, September-October 2009
  • Guest Researcher, University of Bochum, June 2008

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