Institute of Microelectronics

M.Sc. Holger Mandry

I studied Information System Technology at the University of Ulm where I received my B.Sc. degree in 2015 and my M.Sc. in Mai 2018. During the Master I focused on Physical Unclonable Functions (PUFs) and wrote my thesis "Entwurf und Implementierung einer vollständig modularisierten PUF-Codierungskette auf einem SoC" at the Institute of Microelectronics.

Since August 2018 I am working as research assistant towards the Ph.D. degree under the supervision of Prof. Dr.-Ing Maurits Ortmanns. In my research I focus on the improvement of mixed-signal PUF implementations.

Projekte

Physical Unclonable Functions (PUFs)

H. Mandry: Im Lauf des letzten Jahrzehnts haben Physikalisch Unklonbare Funktionen (PUFs) sich als fester Bestandteil auf dem Gebiet der Kryptographie und der Authentifizierung etabliert. Diese basieren auf physikalischen Abweichungen, die sich aufgrund beschränkter Präzision während des Herstellungsprozess ergeben. PUFs bieten daher hervorragende Eigenschaften für die genannten Forschungsfelder, inbesondere Einzigartigkeit, Unvorhersagbarkeit und Unklonbarkeit ... [ mehr]

Studentische Arbeiten

[mt] = Masterarbeit, [rp] = Bachelorarbeit

Aktuelle Arbeiten

Abgeschlossene Arbeiten

  • Victor Bayer
    Evaluation of protection mechanisms against neural networks attacking PUFs [mt]
  • Jonas Lückfeldt
    Entwurf und Implementierung einer Soft-Decision Decodierung für mehrwertige Physikalisch Unklonbare Funktionen auf einem FPGA [mt]
  • Julius Nowakowski
    Investigation of a side-channel attack resistant multi-valued PUF Implementation for FPGAs [rp]
  • Felix Vogel
    Entwurf und Implementierung einer permutierten PUF Architektur auf FPGAs [rp]
  • Jonas Otto
    Breaking Physical Unclonable Functions using Neural Networks [rp]
  • Viktor Schneider (Z)
    PUF Hash Algorithmus zur Erstellung Kryptographischer Schlüssel [rp]
  • Zimin Chen
    Implementation of a true random number generator on a FPGA [mt]

Publikationen

2024

14.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Ortmanns, M.
Optimisation of RO-PUF Design Parameters for Minimising the Effective Area per PUF Bit
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
DOI:10.1109/ISCAS58744.2024.10558478

2023

13.
Driemeyer, B.; Kässer, P.; Mandry, H.; Wiens, D.-P.; Ortmanns, M.
A Feasibility Study on a Switched-Capacitor Based PUF in 28 nm Technology
30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye
December 2023
DOI:10.1109/ICECS58634.2023.10382899

2022

12.
Sporer, M.; Reich, S.; Mandry, H.; Becker, J.; Ortmanns, M.
A Wireless Headstage Prototype Based on a Neurorecorder IC
IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipei, Taiwan
October 2022
DOI:10.1109/BioCAS54905.2022.9948554
11.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Ortmanns, M.
PUF-Entropy Extraction of DAC Intersymbol-Interference using Continuous-Time Delta-Sigma ADCs
IEEE International Conference on Electronics, Circuits and Systems (ICECS)
October 2022
DOI:10.1109/ICECS202256217.2022.9971072

2021

10.
Müelich, S.; Mandry, H.; Ortmanns, M.; Fischer, R.
A Multilevel Coding Scheme for Multi-Valued Physical Unclonable Functions
IEEE Transactions on Information Forensics and Security
June 2021
DOI:10.1109/TIFS.2021.3089883
9.
Mandry, H.; Müelich, S.; Becker, J.; Fischer, R.; Ortmanns, M.
Using Polynomial Interpolation for Reproducing Multi-Valued Responses of Physical Unclonable Functions on FPGAs
IEEE International Symposium on Circuits and Systems (ISCAS)
May 2021
DOI:10.1109/ISCAS51556.2021.9401501

2020

8.
Herkle, A.; Rossak, P.; Mandry, H.; Becker, J.; Ortmanns, M.
Comparison of measurement and readout strategies for RO-PUFs on Xilinx Zynq-7000 SoC FPGAs
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
7.
Herkle, A.; Mandry, H.; Becker, J.; Reich, S.; Sporer, M.; Ortmanns, M.
Extracting Weak PUFs from Differential Nonlinearity of Digital-to-Analog Converters
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
6.
Herkle, A.; Mandry, H.; Becker, J.; Ortmanns, M.
Live Demonstration: Generating FPGA Fingerprints utilizing Full-Chip Characterization with Ring-Oscillator PUFs
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
5.
Mandry, H.; Herkle, A.; Müelich, S.; Becker, J.; Fischer, R.; Ortmanns, M.
Normalization and Multi-Valued Symbol Extraction from RO-PUFs for Enhanced Uniform Probability Distributions
IEEE Transactions on Circuits and Systems--II: Express Briefs
March 2020
DOI:10.1109/TCSII.2020.2980748

2019

4.
Rajabzadeh, M.; Ungethüm, J.; Mandry, H.; Schilpp, C.; Wittekindt, O.; Ortmanns, M.
An Evaluation Study of Various Excitation Signals for Electrical Impedance Spectroscopy
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan
May 2019
3.
Chi, J.; Mandry, H.; Ortmanns, M.
Finite Gain-Bandwidth of Q Enhancement in Bandpass CT ΣΔ Modulator and Compensation
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan, pp. 1-5.
May 2019
2.
Herkle, A.; Mandry, H.; Becker, J.; Ortmanns, M.
In-depth Analysis and Enhancements of RO-PUFs with a Partial Reconfiguration Framework on Xilinx Zynq-7000 SoC FPGAs
IEEE International Symposium on Hardware Oriented Security and Trust (HOST), Tysons Corner, USA
May 2019
DOI:10.18725/OPARU-14107
1.
Mandry, H.; Herkle, A.; Kürzinger, L.; Müelich, S.; Becker, J.; Fischer, R.; Ortmanns, M.
Modular PUF Coding Chain with High-Speed Reed-Muller Decoder
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan
May 2019

Wissenschaftl. Mitarbeiter

Holger Mandry