Jesko Dujmovic
Hello, I'm Jesko Dujmovic, well technically Dujmović, but I prefer Dujmovic. It is easier to type and does not break any forms.
I'm currently a PhD candidate with Nico Döttling at CISPA. I'm generally interested cryptography, preferably theoretical cryptography, but I also love to see protocols deployed in real life. More specifically, I love working on Private Information Retrieval, Time-Lock Puzzles, obfuscation, idealized models, proof systems, and so much more.
I'm always down for a conversation about cryptography, so if you see me at a conference just talk to
me. There should be a picture of me on this website. You can also email me at
jesko . dujmovic @ cispa . de or find me on X.
If you are looking for a good conversation starter
with me ask me about my opinions on the random oracle model.
Publications (Scholar,dblp)
Here is a list of my publications (if I keep updating it)- Space-Lock Puzzles and Verifiable Space-Hard Functions from Root-Finding in Sparse
Polynomials
Nico Döttling, Jesko Dujmovic, Antoine Joux
TCC 2024 - Lower-Bounds on Public-Key Operations in
PIR
Jesko Dujmovic, Mohammad Hajiabadi
Eurocrypt 2024 - Time-Lock Puzzles with Efficient Batch
Solving
Jesko Dujmovic, Rachit Garg, Giulio Malavolta
Eurocrypt 2024 - Rate-1 Incompressible Encryption from Standard
Assumptions
Perdo Branco, Nico Döttling, Jesko Dujmovic
Theory of Cryptography Conference 2022 - Maliciously Circuit-Private FHE from
Information-Theoretic
Principles
Nico Döttling, Jesko Dujmovic
Information-Theoretic Cryptography 2022 - Algebraic Restriction Codes and Their
Applications
Divesh Aggarwal, Nico Döttling, Jesko Dujmovic, Mohammad Hajiabadi, Giulio Malavolta, Maciej Obremski
Innovations in Theoretical Computer Science 2022 and Algorithmica 2023
Talks
Here is a list of talks I gave. Will try to link it if there is a video of it.- Space-Lock Puzzles and Verifiable Space-Hard Functions from Root-Finding in Sparse
Polynomials
Theory of Cryptography Conference, December 2024 - Somewhat-Homomorphic Encryption from Sparse LPN and DDH
CISPA Cryptography Seminar, November 2024 - Computational Error Correcting Codes
CISPA Cryptography Seminar, October 2024 - Lower-Bounds on Public-Key Operations
in PIR
Eurocrypt, May 2024 - Lower-Bounds on Public-Key Operations in PIR
CISPA Cryptography Seminar, March 2024 - Basics of 2PC
CISPA Cryptography Graduate Seminar, October 2023 - Time-Lock Puzzles with Efficient Batch Solving
CISPA Cryptography Seminar, October 2023 - OT Extensions Cannot Communicate Optimally
MPI-SP Bochum, July 2023 - Simple, Single-Server PIR with Sublinear Server Computation
CISPA Cryptography Seminar, April 2023 - How Not to Use the Random Oracle
Young Researchers Cryptography Seminar, March 2023 - Doubly Efficient Private Information Retrieval
CISPA Cryptography Seminar, December 2022 - Rate-1 Incompressible Encryption
from
Standard Assumptions
Theory of Cryptography Conference, November 2022 - How Not to Use the Random Oracle
CISPA Cryptography Seminar, September 2022 - Maliciously Circuit-Private FHE from
Information-Theoretic Principles
Information-Theoretic Cryptography, July 2022 - Post-Quantum Insecurity from LWE
CISPA Cryptography Seminar, July 2022 - Algebraic Restriction Codes and Their
Applications
Innovations in Theoretical Computer Science, February 2022 - Maliciously Circuit-Private FHE from Information-Theoretic Principles
CISPA Cryptography Seminar, December 2021
Teaching
It follows a list of teaching/organizing I've done.- Organizer for CISPA Cryptography Seminar
CISPA, May 2022 - present - Lecturer for Advanced Public-Key Cryptography
Saarland University, Winter Semester 2024/2025 - Teaching Assistant for Quantum Cryptography Seminar
Saarland University, Winter Semester 2023/2024 - Teaching Assistant for Advanced Cryptography Seminar
Saarland University, Summer Semester 2023 - Teaching Assistant for Cryptography
Saarland University Summer Semester 2021 - Organizer for CISPA Bachelor and Master Thesis Colloquium
CISPA May 2020 - June 2021 - Teaching Assistant for Cryptography
Saarland University Summer Semester 2020 - Tutor for Cryptography
Saarland University Summer Semester 2019 - Tutor for Theoretical Computer Science
Saarland University Winter Semester 2018/2019 - Tutor for Concurrent Programming
Saarland University Summer Semester 2018 - Tutor for Theoretical Computer Science
Saarland University Winter Semester 2017/2018
Community Service
I've been a subreviewer at these conferences:- PKC 2025
- ACNS 2025
- Asiacrypt 2024
- Eurocrypt 2024
- Eurocrypt 2023
- Asiacrypt 2023
- Crypto 2023
- TCC 2023
- ICALP 2023
- ACNS 2023
- Crypto 2022
- PKC 2022
- ACNS 2022
People
Here is a list of people I've worked with.- Divesh Aggarwal
- Pedro Branco
- Nico Döttling
- Rachit Garg
- Mohammad Hajiabadi
- Antoine Joux
- Giulio Malavolta
- Maciej Obremski
- Benedikt Wagner
Blog (Not a Paper)
In this blog I'm planning to document some of my ideas that interesting to me, but not significant enough to write a paper about them. The idea is just to get the ideas out there. So these posts will not be up to scientific standards. If you feel like working on one of these ideas with me, feel free to reach out.
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