Aydin Abadi


I am a senior research fellow at University College London (UCL).

My main research interests include information security, privacy, and cryptography, with a focus on:

  • Bank and Payment Fraud

  • Developing Privacy Enhancing Technologies (PETs) such as:

        • Private Set Intersection (PSI)

        • Secure Multi-party Computation (MPC)

        • Time-lock Encryptions

  • Blockchain Technology and its Applications

  • Verifiable Computation

  • Smart Contracts' Design, Implementation, and Applications

  • Cloud computing's Security (including storage and computation)

  • Data Structures' use to improve cryptographic protocols' efficiency

I'm a member of the UCL information security research group (UCL InfoSec) and the National Research Centre on Privacy, Harm Reduction, and Adversarial Influence Online (REPHRAIN). I've been collaborating with Professor Steven J. Murdoch on PAYMENT project. Prior to holding the current position, I held a lectureship position at the University of Gloucestershire and before that, I was a research associate at the University of Edinburgh, where I was a member of the Blockchain Technology Laboratory Briefly, my work can be categorised into (a) Pure Research: designing provable cryptographic protocols, and (b) Research and Development: developing new (decentralised) cryptographic applications, such as PIMS and ValuED platforms.

Education/Academic qualification:

  • Doctor of Philosophy (PhD), University of Strathclyde- Glasgow

  • Master of Computing (MSc), University of Leeds

  • Bachelor of Science (Honours), University of Lahijan

Other Profiles:

  • My ''Google Scholar'' can be found here.

  • My ''DBLP Profile'' can be found here.

  • My ''GitHub profile'' can be found here, which contains the codes of the open source software and decentralised apps (Dapps) I have developed.

Latest News:


  • Our new paper's eprint has been released now (Aug 2022).

"A Forward-secure Efficient Two-factor Authentication Protocol''

Steven J. Murdoch and Aydin Abadi

* It is available here


  • Our new paper's eprint has been released now (Aug 2022).

"Recurring Contingent Service Payment''

Aydin Abadi, Steven J. Murdoch, and Thomas Zacharias

* It is available here


  • Our new paper's eprint has been released now (Jan 2022).

"Payment with Dispute Resolution: A Protocol For Reimbursing Frauds' Victims''

Aydin Abadi and Steven J. Murdoch

* It is available here.


  • Our paper has been accepted at FC 2022.

"Multi-party Updatable Delegated Private Set Intersection''

Aydin Abadi, Changyu Dong, Steven J. Murdoch, and Sotirios Terzis

* It is available here.


  • Our new paper's eprint has been released now.

"ValuED: A Blockchain-based Trading Platform to Encourage Student Engagement in Higher Education"

Aydin Abadi, Jin Xiao, Roberto Metere, and Richard Shillcock

* It is available here.


  • Our new paper's eprint version has been released now.

"Recurring Contingent Payment for Proofs of Retrievability"

Aydin Abadi, Steven J. Murdoch, and Thomas Zacharias

* It is available here


  • My new book chapter entitled "Smarter Data Availability Checks in the Cloud: Proof of Storage via Blockchain" will appear in the "Handbook of Research on Digital Transformation, Industry Use Cases, and the Impact of Disruptive Technologies".

* The book is released on October 2021 and is available here.


"Polynomial Representation Is Tricky: Maliciously Secure Private Set Intersection Revisited"

Aydin Abadi, Steven J. Murdoch, and Thomas Zacharias

* A preprint version is available here

* A YouTube link to my talk at the UCL-InfoSec seminar about the paper can be found here.


  • Our new paper has been accepted at FC 2021:

''Multi-instance Publicly Verifiable Time-lock Puzzle and its Applications''

Aydin Abadi and Aggelos Kiayias.

* A preprint version is available here

* A recorded talk is available here


  • Our new paper has been accepted at OZCHI 2020:

''Smart Donations: Event-Driven Conditional Donations Using Smart Contracts On The Blockchain''

Ludwig Trotter, Aydin Abadi, Mike Harding, Peter Shaw, Nigel Davies, Chris Elsden, Chris Speed, John Vines, Josh Hallwright

* A preprint version is available here


  • Our decentralised software has been released on Sep 2020:

''Privacy-preserving Identity Management System'' (PIMS)

* It can be found here.


Program Committee Membership:


Other Academic Services:

  • Member of UCL Computer Science Research Ethics Committee (2022).