Simon Pohmann

EmailSimon.Pohmann.2022@live.rhul.ac.uk
Research InterestsCryptography, Computational Mathematics
Current AffiliationRoyal Holloway, University of London
I'm Simon Pohmann, and I am currently a PhD in Cryptography student at Royal Holloway. I have a background in Mathematics, and my current research is on both theoretical and implementation aspects of lattice-based cryptography, in particular Fully Homomorphic Encryption (FHE). I'm the author of the feanor-math and fheanor Rust libraries for computational mathematics and FHE, respectively. On the theoretical side, I am investigating efficient polynomial evaluation in the context of FHE, and in particular Doubly-Efficient Private Information Retrieval.

Publications

Authors are ordered alphabetically.
OPP25
ia.cr/2025/864		H. Okada, R. Player, and S. Pohmann. “Fheanor: a new, modular FHE library for designing and optimising schemes”. In: Cryptology ePrint Archive (2025).
OPPW25
ia.cr/2024/1307		H. Okada, R. Player, S. Pohmann, and C. Weinert. “On algebraic homomorphic encryption and its applications to doubly-efficient PIR”. In: Annual International Conference on the Theory and Applications of Cryptographic Techniques. Springer. 2025, pp. 34-64.
OPPW24
ia.cr/2023/1510		H. Okada, R. Player, S. Pohmann, and C. Weinert. “Towards practical doubly-efficient private information retrieval”. In: International Conference on Financial Cryptography and Data Security. Springer. 2024, pp. 264-282.
OPP23
ia.cr/2023/1304		H. Okada, R. Player, and S. Pohmann. “Homomorphic polynomial evaluation using Galois structure and applications to BFV bootstrapping”. In: International Conference on the Theory and Application of Cryptology and Information Security. Springer. 2023, pp. 69-100.
P22
ox.ac.uk		S. Pohmann. “Generating supersingular curves with modular polynomials”. MA thesis. Oxford University. 2022.
PSZ21
ia.cr/2021/430		S. Pohmann, M. Stevens, and J. Zumbrägel. “Lattice enumeration on gpus for fplll”. In: Cryptology ePrint Archive (2021).

Talks and Posters

12/08/2025
on youtu.be		“An introduction to the FHE library Fheanor”. COSIC Seminar at KU Leuven.
25/03/2025
on github.com		“On algebraic homomorphic encryption and its applications to doubly-efficient PIR”. Poster Presentation at FHE.org 2025.
06/03/2024
on youtu.be		“Towards practical doubly-efficient private information retrieval”. Conference Presentation at Financial Cryptography 2024.
06/12/2023“Homomorphic polynomial evaluation using Galois structure and applications to BFV bootstrapping”. Conference Presentation at ASIACRYPT 2023.
05/10/2023
on fhe.org		“Homomorphic polynomial evaluation using Galois structure and applications to BFV bootstrapping”. FHE.org meetup.

Experience and Education

2022 - nowPhD in the Information Security Group at Royal Holloway, University of London. Supervised by Dr Rachel Player.
2025
01/04 - 28/06		Internship at KDDI Research, Tokyo.
2021 - 2022M.Sc. in Mathematics and Foundations of Computer Science at Oxford University, UK. Final Grade: Distinction.
2020 - 2021M.Sc. in Computational Mathematics at University of Passau, Germany. Discontinued because of above offer from Oxford; Preliminary Grade 1.0.
2018 - 2020B.Sc. in Mathematics at University of Passau, Germany. Final Grade: 1.0.
2017 - 2020B.Sc. in Computer Science at University of Passau, Germany. Final Grade: 1.0.
2017 - 2019Working student at msg systems, Passau, Germany.