Avatar

Monika Trimoska

I am an assistant professor at the Coding Theory and Cryptology group at Eindhoven University of Technology (TU/e), led by Tanja Lange. Previously, I was a postdoc in the Digital Security group at Radboud University, working with Simona Samardjiska and Peter Schwabe. I did my PhD in MIS Laboratory at the University of Picardie Jules Verne, under the supervision of Gilles Dequen and Sorina Ionica. After my thesis, I was a Teaching and Research Assistant (ATER) at the University of Picardie Jules Verne.

Currently, my primary research interest is cryptanalysis of post-quantum cryptosystems, specifically multivariate, code-based and isogeny-based. During my thesis, I was investigating the use of SAT solvers in cryptographic attacks on public-key cryptosystems, with a focus on elliptic curve cryptography.


Research interests tags

multivariatecode-basedisogeniesECCalg. cryptanalysisSATsignaturesfault injection


Contact

m [dot] trimoska [at] tue [dot] nl

Research


Publications

Theses

Combinatorics in Algebraic and Logical Cryptanalysis ECC alg. cryptanalysis SAT
PhD thesis
supervised by Sorina Ionica and Gilles Dequen
defended on 14th January 2021
[manuscript][slides][video]

Journal papers

Hardness estimates of the Code Equivalence Problem in the Rank Metric code-based multivariate alg. cryptanalysis
with Krijn Reijnders and Simona Samardjiska
DCC 2024
[author's version]

Time-Memory Analysis for Parallel Collision Search Algorithms ECC
with Sorina Ionica and Gilles Dequen
TCHES, Volume 2021, Issue 2
[link][slides][video]

Book chapters

HappyKidz: Privacy Preserving Phone Usage Tracking homomorphic encryption
with Benjamin M. Case and Marcella Hastings and Siam Hussain
Protecting Privacy through Homomorphic Encryption
[link]

International Conferences

Algebraic Algorithm for the Alternating Trilinear Form Equivalence Problem code-based signatures alg. cryptanalysis
with Lars Ran and Simona Samardjiska
CBCrypto 2023
[author's version][slides]

Take your MEDS: Digital Signatures from Matrix Code Equivalence code-based signatures alg. cryptanalysis
with Tung Chou, Ruben Niederhagen, Edoardo Persichetti, Tovohery Hajatiana Randrianarisoa, Krijn Reijnders and Simona Samardjiska
Africacrypt 2023
[author's version]

Disorientation faults in CSIDH isogenies fault injection
with Gustavo Banegas, Juliane Krämer, Tanja Lange, Michael Meyer, Lorenz Panny, Krijn Reijnders and Jana Sotáková
Eurocrypt 2023
[author's version]

Parallel Isogeny Path Finding with Limited Memory isogenies
with Emanuele Bellini, Jorge Chavez-Saab, Jesús-Javier Chi-Domínguez, Andre Esser, Sorina Ionica, Luis Rivera-Zamarripa, Francisco Rodríguez-Henríquez and Floyd Zweydinger
Indocrypt 2022
[author's version]

A Simple Deterministic Algorithm for Systems of Quadratic Polynomials over $\mathbb{F}_2$ alg. cryptanalysis
with Charles Bouillaguet and Claire Delaplace
SOSA 2022
[author's version][implementation by C. Bouillaguet]

Logical cryptanalysis with WDSat SAT alg. cryptanalysis
with Gilles Dequen and Sorina Ionica
SAT 2021
[author's version][slides][video]

Parity (XOR) Reasoning for the Index Calculus Attack SAT alg. cryptanalysis ECC
with Sorina Ionica and Gilles Dequen
CP 2020
[author's version][slides][video]

A SAT - Based Approach for Index Calculus on Binary Elliptic Curves SAT alg. cryptanalysis ECC
with Sorina Ionica and Gilles Dequen
Africacrypt 2020
[author's version][slides]

Preprints

Practical key-recovery attack on MQ-Sign multivariate signatures alg. cryptanalysis
with Thomas Aulbach and Simona Samardjiska
[link][implementation]

Artifacts

Parallel Collision Search implementation ECC
with Sorina Ionica and Gilles Dequen
TCHES 2021
[link]

Talks

Upcoming

DISTANT Training School  
Intro to PQC, at the DISTANT Training School affiliated with Summer school on RWC and privacy in Croatia 2024 [event]
2 June 2024 Vodice, Croatia

CrypTOgraphy days 2024  
Algebraic and Combinatorial Algorithms for Equivalence Problems, at the CrypTOgraphy days 2024 [event]
17 May 2024 Turin, Italy


MWCC 2024  
Algebraic and Combinatorial Algorithms for Equivalence Problems, at the Munich Workshop on Coding and Cryptography 2024 [event][slides]
09 April 2024 Munich, Germany

PQC Spring School 2024  
Multivariate cryptography [event][resources]
15 March 2024 Porto, Portugal

IMB Seminar  
Disorientation faults in CSIDH, at Séminaire de Théorie Algorithmique des Nombres [slides][webpage]
28 November 2023 Institut de Mathématiques de Bordeaux, Bordeaux, France

Women in science  
Design and cryptanalysis of post-quantum digital signature schemes, at Ciclo de conferencias de la Mujer en la Ciencia [slides][event]
30 August 2023 online (Universidad Anáhuac Mexico)

Africacrypt 2023
Take your MEDS: Digital Signatures from Matrix Code Equivalence, at the 14th International Conference on Cryptology AFRICACRYPT 2023 [slides]
20 July 2023 Sousse, Tunisia

SIAM-AG 2023  
Setting the Stage: Isogeny-Based Cryptography, at the SIAM Conference on Applied Algebraic Geometry (AG23) [slides]
13 July 2023 Eindhoven, The Netherlands

CBCrypto 2023
Algebraic Attack on the Alternating Trilinear Form Equivalence Problem, at the 4th International Workshop on Code-Based Cryptography [slides]
22 April 2023 Lyon, France

CWG meetings  
Disorientation faults in CSIDH, at Crypto Working Group meetings [slides]
17 March 2023 Utrecht, The Netherlands

MIS Seminar  
The Matrix Code Equivalence Problem and Applications, at Séminaire de Laboratoire MIS [slides]
24 November 2022 Amiens, France

CSNG 2022  
Digital Signatures from the Matrix-code Equivalence problem, at the 8th Annual Cyber Security Next Generation Workshop [slides]
13 October 2022 Delft, The Netherlands

CrossFyre 2022
Disorientation faults in CSIDH, at the 11th International Workshop on Cryptography, Robustness, and Provably Secure Schemes for Female Young Researchers [slides]
6 October 2022 Passau, Germany

Virtual Summer School
The Matrix Code Equivalence Problem and Applications, at the Contemporary algebraic and geometric techniques in coding theory and cryptography [abstract][slides]
21 July 2022 online (Università degli Studi della Campania Luigi Vanvitelli)

CrossFyre 2021
A Simple Deterministic Algorithm for Systems of Quadratic Polynomials over $\mathbb{F}_2$, at the 10th International Workshop on Cryptography, Robustness, and Provably Secure Schemes for Female Young Researchers [slides]
2 December 2021 online

CHES 2021
Time-Memory Analysis for Parallel Collision Search Algorithms, at the annual Conference on Cryptographic Hardware and Embedded Systems [slides][pre-recording][live session]
13 September 2021 online

SAT 2021
Logical cryptanalysis with WDSat, at the 24th International Conference on Theory and Applications of Satisfiability Testing [slides]
7 July 2021 online (Barcelona, Spain)

AGC2T
A SAT-based approach for index calculus on binary elliptic curves, at the Arithmetic, Geometry, Cryptography and Coding Theory Conference [slides][video]
1 June 2021 online (CIRM, Marseille Luminy, France)

Caramba Seminar  
Cryptanalyse logique du problème du logarithme discret sur courbes elliptiques, at Séminaire de l'équipe Caramba (Inria Nancy) [slides]
12 March 2021 online (INRIA Nancy)

ATI Seminar  
Calcul d'index pour des courbes elliptiques définies sur des extensions de corps finis, at Séminaire Arithmétique et Théorie de l’Information [slides]
18 February 2021 online (Université Aix-Maseille)

CP 2020
Parity (XOR) Reasoning for the Index Calculus Attack, at the 26th International Conference on Principles and Practice of Constraint Programming [slides][video]
9 September 2020 online (Louvain-la-Neuve, Belgium)

IMACC 2019
A SAT-based approach for index calculus on binary elliptic curves, at the 17th IMA International Conference on Cryptography and Coding [slides]
17 December 2019 St Anne’s College, University of Oxford, Oxford, UK

MSR Seminar  
A SAT-based approach for index calculus on binary elliptic curves, at a seminar at the Microsoft Reasearch Lab [slides]
5 December 2019 Microsoft Research, Redmond, Washington, USA

Private AI Bootcamp
HappyKidz: Privacy Preserving Phone Usage Tracking, at Private AI Bootcamp Competition 2019 [video]
4 December 2019 Microsoft, Redmond, Washington, USA

JJCMIS 2019  
Analyse de la difficulté des Cryptosystèmes à l’Aide du Problème du Transversal Minimum, at Journée des Jeunes Chercheurs du MIS 2019 [slides]
5 July 2019 Amiens, France

GT BAC  
A SAT-based approach for index calculus on binary elliptic curves, at Groupe de Travail "Butte aux Cailles" [slides]
16 May 2019 l'ENST (Télécom ParisTech), Paris, France

JC2 2018
Time-Memory Trade-offs for Parallel Collision Search Algorithms, at Journées Codage & Cryptographie 2018 [slides]
11 October 2018 Centre Paul-Langevin – CAES du CNRS, Aussois, France

JJCMIS 2018
Cryptanalyse logique du problème du logarithme discret, at Journée des Jeunes Chercheurs du MIS 2018 [slides]
29 May 2018 Amiens, France

JRES 2017
A propos d'un schéma d'authentification OTP, at Journées Réseaux de l’Enseignement et de la Recherche 2017 [video]
15 November 2017 Nantes, France

JJCMIS 2017
Protocole d’authentification CrypTonAuth, at Journée des Jeunes Chercheurs du MIS 2017 [slides]
30 May 2017 Amiens, France

Other outreach materials

Alice & Eve 2021 Poster [event]

Diffie-Hellman key exchange with colors
Presented at a laboratory visit for students who have participated in the Alkindi cryptography competition.

Time-Memory Trade-offs for PCS Algorithms - poster in French

Le protocole d’authentification CrypTonAuth
Newsletter of MIS Laboratory, September 2017

Software

MCE
Implementations of algorithms for solving the Matrix Code Equivalence problem (MCE).
[github]

WDSat
A SAT solver dedicated to solving instances derived from a Weil descent.
[github]

PCS - Published as TCHES 2021 Artifact
Implementation of a Parallel Collision Search algorithm for solving the ECDLP.
[github]

Weil descent
A Weil descent implementation for binary elliptic curves over prime-degree extension fields.
[github]

CrypTonAuth
A C library for implementing the CrypTonAuth authentication method, prepared for ANSSI standardisation.
[proprietary]

CrypTonID
A C library for implementing the CrypTonID technology, prepared for ANSSI standardisation.
[proprietary]

Prizes and distinctions

I was part of the winning team of the Private AI Bootcamp organised by Microsoft Research (December 2019, Seattle, US).

Teaching


Courses

 Eindhoven University of Technology:

Selected Areas in Cryptology
MasterMath course [course page].
2023/2024

Cryptology
Master's course at Radboud University - guest lecture [Cryptanalysis in elliptic curve cryptography].
2023/2024


 Radboud University:

Cryptology
Master's course - invited lecture [Cryptanalysis in elliptic curve cryptography], assignments.
2022/2023


 University of Picardie Jules Verne

Object-oriented programming 2 and Reactive programming
Third year - lectures, tutorials and laboratory work (cours, TD, TP).
2018/2019, 2019/2020

Advanced algorithms
Second year - tutorials and laboratory work (TD, TP).
2020/2021

C programming
Second year - laboratory work (TP).
2018/2019, 2019/2020

Elements of formal logic and mathematical reasoning
First year - tutorials (TD).
2020/2021

Algorithms and programming
First year - tutorials and laboratory work (TD, TP).
2020/2021

Propositional logic
First year - tutorials and laboratory work (TD, TP).
2017/2018

Introduction to databases
First year - tutorials and laboratory work (TD, TP).
2020/2021

Introduction to programming
First year - tutorials and laboratory work (TD, TP).
2018/2019, 2019/2020, 2020/2021

Internet and web
First year - tutorials and laboratory work (TD, TP).
2020/2021

Mentoring

Bachelor's Thesis
I am currently a daily supervisor of a Bachelor's thesis on the topic of assesing the diffuclty of the QMLE problem over $\mathbb{F}_2$, co-supervised with Simona Samardjiska.

Master's Thesis
I acted as second reader of the Master thesis of Marta Parada Segui, titled Elliptic curves: various models and their addition laws, supervised by Wieb Bosma.

Master's Internship
I co-supervised, with Sorina Ionica, a student in their second year of Master's studies on the topic of computing multiple elliptic curve discrete logarithms using the Parallel collision search algorithm by van Oorschot and Wiener.

Undergraduate internship
I co-supervised, with Gilles Dequen, a student in their third year of Undergraduate studies in CS. The student was working on a commercial presentation (website, explanatory animations) of the CrypTonAuth authentication technology and on storage solutions.

Activities


Program committee:
  • AAC 2024
  • ESORICS 2023 posters
  • ACNS 2024
  • ISC 2023
  • CHES 2023 Artifact Review
  • CHES 2022 Artifact Review
External reviewing:
  • EURASIP Journal on Information Security
  • PKC 2024
  • ACISP 2023
  • Journal of Cryptographic Engineering
  • IEEE TIFS
  • PKC 2023
  • CT-RSA 2023
  • Asiacrypt 2022
  • Crypto 2022
  • WCC 2022
  • Journal of Cybersecurity
  • Latincrypt 2021
  • SAT 2021
  • Crypto 2019
Program (Co-)Chair:
  • ICT.OPEN 2024 track: Cryptography for security and privacy - emerging challenges (with Simona Samardjiska)
  • Best Cybersecurity Master Thesis (BCMT) Award in the Netherlands 2023 (with Balakrishnan Chandrasekaran)
Scientific/Organizing committee:
  • Summer School on real-world crypto and privacy 2024 (with Lejla Batina, Silvia Mella, Stjepan Picek and Simona Samardjiska)
  • 2nd Oxford Post-Quantum Cryptography Workshop 2023 (with Ali El Kaafarani, Federico Pintore, Thomas Prest, Simona Samardjiska and Peter Schwabe)
  • Minisymposium Applications of Isogenies in Cryptography at SIAM AG23 Conference (with Tanja Lange and Krijn Reijnders)
  • Summer School on real-world crypto and privacy 2023 (with Lejla Batina, Silvia Mella, Stjepan Picek and Simona Samardjiska)
  • Journée des Jeunes Chercheurs du MIS 2019 (with Viet Long Bui Tuan and Eder Alejandro Rodríguez-Martínez)
Helping with conference organisation:
  • Summer School on real-world crypto and privacy 2022
  • RWC 2022
  • Eurocrypt 2021
  • JFPC/JIAF 2018 (National Constraint Programming Days in France / National Artificial Intelligence Days in France)
Research committee:
  • University of Picardie Jules Verne - elected student member from April 2018 to March 2020
Other outreach activities:
  • I animated, with Sorina Ionica, a laboratory visit for primary school students who have participated in the Alkindi cryptography competition.

Other interests

When I'm not thinking about crypto problems, you can find me at the circus. I had practiced contemporary ballet for 11 years and am currently practicing aerial arts: aerial hoop, pole, trapeze & working towards getting strong enough for straps.

Icon credit (CC)