Other Professional Activities

Reviews

  • Journals
    • Microelectronics Journal, Elsevier (Outstanding Reviewer)
    • Transactions on Very Large Scale Integration (TVLSI) Systems, IEEE
    • Transactions on Dependable and Secure Computing (TDSC), IEEE (10×)
    • Consumer Electronics Magazine, IEEE (10×)
    • Security and Communication Networks, Hindawi – Wiley
    • Microelectronic Engineering, Elsevier
    • Cryptography, MDPI
    • Journal of Industrial Information Integration, Elsevier
    • Transactions on Circuits and Systems (TCAS) II: Express Briefs, IEEE
    • Information, MDPI
    • Transactions on Circuits and Systems (TCAS) I: Regular Papers, IEEE
    • Discover Internet of Things, Springer
    • Computation, MDPI
    • Microprocessors and Microsystems, Elsevier
    • Transactions on Information Forensics and Security (TIFS), IEEE
    • Computer Standards & Interfaces, Elsevier
    • Electronics, MDPI
    • Artificial Intelligence Review, Elsevier
    • Energy Reports, Elsevier
    • Micromachines, MDPI
    • Entropy, MDPI
    • Journal of Low-Power Electronics and Applications, MDPI
    • Sensors, MDPI
    • Frontiers in Signal Processing, Frontiers Media
    • Symmetry, MDPI
    • Transactions on Cognitive Communications and Networking (TCCN), IEEE
    • Applied Sciences, MDPI
    • Future Internet, MDPI
    • Sensors Journal, IEEE
    • Drones, MDPI
    • Cybernetics and Systems, Taylor & Francis
    • Signal Processing Letters, IEEE
    • Mathematics, MDPI
    • Automatika: Journal for Control, Measurement, Electronics, Computing and Communications, Taylor & Francis
    • Open Research Europe, Directorate-General for Research and Innovation of the European Commission & F1000 Research, a member of the Taylor & Francis Group
    • PLoS One, Public Library of Science (PLoS)
    • Transactions on Consumer Electronics (TCE), IEEE
    • Cluster Computing, Springer
    • Analog Integrated Circuits and Signal Processing, Springer
    • Tsinghua Science and Technology, Tsinghua University Press
    • Transactions on Reconfigurable Technology and Systems, ACM
    • Journal of Electrical and Computer Engineering, Hindawi – Wiley
    • The Journal of Supercomputing, Springer
    • Journal on Emerging Technologies in Computing Systems (JETC), ACM
    • Internet of Things Magazine, IEEE
    • Japanese Journal of Applied Physics (JJAP), Japan Society of Applied Physics & IOP Publishing
    • Transactions on Nanotechnology (TNANO), IEEE
    • IETE Journal of Research, (Indian) Institution of Electronics and Telecommunication Engineers (IETE) & Taylor & Francis
    • EURASIP Journal on Information Security, European Association for Signal Processing (EURASIP) & Springer
  • Conferences, Workshops & Symposia
    • International Symposium on Circuits and Systems (ISCAS) 2019, IEEE
    • 2nd International Conference on Computer Applications & Information Security (ICCAIS 2019), IEEE Region 8
    • 10th International Workshop on Constructive Side-Channel Analysis and Secure Design (COSADE 2019), IACR
    • International Conference on Hardware/Software Codesign and System Synthesis (CODES+ISSS) 2019, ACM & IEEE
    • 4th IEEE International Circuit and System Symposium (ICSyS 2019), IEEE
    • 15th IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2019), IEEE
    • 7th International Symposium on Security in Computing and Communications (SSCC 2019), Indian Institute of Information Technology and Management – Kerala (IIITM–K)
    • International Symposium on Circuits and Systems (ISCAS) 2020, IEEE
    • 3rd International Conference on Computer Applications & Information Security (ICCAIS 2020), IEEE Region 8
    • IEEE Cloud Summit 2020, IEEE
    • International Symposium on Circuits and Systems (ISCAS) 2021, IEEE
    • 17th IEEE Asia Pacific Conference on Circuits and Systems (APCCAS 2021), IEEE
    • 11th IEEE International Conference on Consumer Electronics – Berlin (ICCE-Berlin 2021), IEEE
    • IEEE Cloud Summit 2021, IEEE
    • 25th Design, Automation and Test in Europe (DATE) Conference 2022, European Design and Automation Association (EDAA) & IEEE
    • International Symposium on Circuits and Systems (ISCAS) 2022, IEEE
    • 12th IEEE International Conference on Consumer Electronics – Berlin (ICCE-Berlin 2022), IEEE
    • IEEE Cloud Summit 2022, IEEE
    • International Symposium on Circuits and Systems (ISCAS) 2023, IEEE
    • 34th International Conference on Application-specific Systems, Architectures, and Processors (ASAP 2023), IEEE
    • IEEE Cloud Summit 2023, IEEE
    • IEEE Sensors Conference 2023, IEEE
    • 26th Design, Automation and Test in Europe (DATE) Conference 2024, European Design and Automation Association (EDAA) & IEEE
    • International Symposium on Circuits and Systems (ISCAS) 2024, IEEE
    • 29th IEEE European Test Symposium (ETS 2024), IEEE
    • 54th Frontiers in Education (FIE) Conference 2024, IEEE
    • 27th Design, Automation and Test in Europe (DATE) Conference 2025, European Design and Automation Association (EDAA) & IEEE
    • 43rd IEEE International Conference on Consumer Electronics (ICCE 2025), IEEE
    • International Symposium on Circuits and Systems (ISCAS) 2025, IEEE
    • 16th IEEE Global Engineering Education Conference (EDUCON 2025), IEEE
    • 14th IEEE International Conference on Consumer Electronics – Berlin (ICCE-Berlin 2025), IEEE

Presentations

Valet de Cyber

  • 23rd ACM Conference on Computer and Communications Security (CCS 2016), 24-28 October 2016, Vienna, Austria.

Moderator

  • "Security of Cyber-Physical Systems" Session of the IEEE Computer Society DVP-SYP (Distinguished Visitors Program - Student & Young Professional) Virtual Conference on Hot Topics in Cybersecurity, 16-17 October 2020, online.
    [IEEE website][on24 website]

Session Chair

Special Session Chair

Workshop Chair

Local Operations Chair

Guest Editor

IEEE Chapter Chair

  • IEEE Germany Section Consumer Technology Society Chapter (CT08), 2024-2025

IEEE Chapter Vice Chair

  • IEEE Germany Section Circuits and Systems Society Chapter (CAS04), 2024-2025
  • IEEE Germany Section Computational Intelligence Society Chapter (CIS11), 2025-2026
  • IEEE Germany Section Vehicular Technology Society Chapter (VT06), 2025-2026

IEEE Chapter Secretary

  • IEEE Germany Section Solid-State Circuits Society Chapter (SSC37), 2024-2025

Research Positions in Scientific Projects

  • NATO Security through Science: Information and Communication Security – Euro-Atlantic Partnership – Collaborative Linkage Grant (ICS.EAP.CLG) 983334: "Cryptography Using Chaotic Oscillators"
    • Bachelor's thesis student (2008-2010)
      This NATO Grant concerned the design, testing, and optimisation of non-linear digital circuits utilised for chaos-based communication and the study of their synchronisation under both optimal and noisy conditions. The latter topic formed the main subject discussed and examined in my bachelor's thesis, as well as the main issue addressed in my first publication.
  • DFG Collaborative Research Centre (CRC) 1119: "CROSSING – Cryptography-Based Security Solutions: Enabling Trust in New and Next Generation Computing Environments"
    • Research Assistant at Project "P3: Hardware-Entangled Security" (Phase I: 2014-2018)
      In its Phase I, Project P3 concerned hardware-entangled cryptography, with a specific focus on Physical Unclonable Functions (PUFs). PUFs are hardware-based primitives used to establish security and trust with minimal hardware requirements. Therefore, PUFs can provide a trust anchor in the next-generation cloud and edge computing paradigm of highly distributed and heterogeneous networks of collaborative resource-limited embedded devices. Additionally, in the last decade before the start of CROSSING's Phase I, remarkable efforts had been put into developing novel PUF constructions and investigating their resilience to different kinds of attacks.
      In this project, we significantly advanced the state of the art in the scientific field of PUFs. More specifically, Project P3 was subdivided into three work packages, concerning: 1) the development of a comprehensive security framework for PUFs, 2) the design of PUF-based pseudorandom functions and 3) the development and evaluation of novel PUF constructions and practical PUF-based protocols.
  • DFG Priority Program (SchwerPunktProgramm (SPP)) 2253: "Nano Security: From Nano-Electronics to Secure Systems"
    • Research Assistant at Project "NANOSEC: Tamper-Evident PUFs based on Nanostructures for Secure and Robust Hardware Security Primitives" (Phase I: 2020-2023)
      In recent years, pronounced trends like the Internet of Things or 5G have led to more and more connected and digitalized cyber-physical systems. This results in an increased demand for embedded dedicated hardware security. Hence, unclonable, unpredictable and tamper-evident hardware security primitives, such as Physical Unclonable Functions (PUFs), became more and more important, since any software-only security solution can easily be defeated in case an attacker has full access to the device.
      In this tandem project, we investigated the suitability of nanomaterial-based devices such as Carbon-NanoTube-based field-effect transistors (CNT-FETs) for hardware security primitives featuring high entropy and robustness along with inherent tamper-evidence capabilities. Going beyond the state of the art, we investigated important security characteristics like error correction, reliability, and tamper-evidence mechanisms of CNT-based PUFs. These investigations induced novel insights regarding the applicability of such PUFs for forthcoming system integration technologies and in the emerging field of flexible/wearable electronics. We covered technological developments for CNT-based PUFs and investigated different device designs which internalized multibit functionality as well as tamper evidence. The realized PUFs were subjected to an in-depth analysis exposing suitable error correction models to enable the extraction of stable PUF responses.
    • External Research Associate/Collaborator at Project "NANOSEC2: Nanomaterial-based platform electronics for PUF circuits with extended entropy sources" (Phase II: 2024-2027)
      In this project, we investigate the potential of advanced NanoMaterial (NM) circuits manufactured in a modular platform technology to serve as Physical Unclonable Functions (PUFs) with enhanced properties. We will implement various entropy sources making use of the fact that NM-based FETs can be significantly manipulated by their environment and interface. This determines the FET characteristic and in case of charge traps hysteretic switching behavior. We will pursue nanocavities in the Carbon-NanoTube Field-Effect Transistor (CNTFET) structures to induce discrete modification of the gate architecture in order to further increase the entropy of the CNT-PUF. This enables quaternary PUFs with four distinct types of PUF cells, namely conducting, semiconducting, altered semiconducting, and non-conducting cells. We will also investigate configurable CNT-FET circuits to provide an even higher level of entropy, by tuning the hysteresis characteristics. Furthermore, we will examine cell selective erasability of the manufactured Circuit-PUFs, disallowing an attacker from accessing the inherent PUF secret in a low-cost manner. Building upon our previous works on non-invasive attacks against CNT-based PUFs, we will also test the resilience of the constructed CNT-PUFs against side-channel and fault-injection attacks.
    • External Research Associate/Collaborator at Project "PUFMem: Intrinsic Physical Unclonable Functions from Emerging Non-Volatile Memories" (Phase I: 2020-2023)
      Recent developments have led to the proliferation of resource-constrained devices that undertake increasingly extensive and decisive tasks. Based on physical process variations during semiconductor manufacturing, memory-based physical unclonable functions (PUFs) provide lightweight, cost-efficient, and flexible hardware-based security primitives to protect these devices. Concurrently with these trends, the integration density of circuits is approaching the so-called scaling limit, where structures become so small that the saved information is hard to retrieve and that consequently brings novel non-volatile memory (NVM) types to the scene.
      In this project, we investigated the realization of intrinsic PUFs on commercially available NVMs. All obtained PUF instances were systematically characterized according to established quality metrics. As PUFs from conventional memories are susceptible to varying temperature and supply voltage as well as magnetic fields and radiation, different environmental conditions for the characterization of PUF instances on NVMs were created. In the next step, we quantified the results and applied advanced techniques such as protocols, error-correcting codes, stochastic models etc. to improve PUF quality and resilience to influences from the environment. In particular, when used as random access memory in present-day computers, credentials and results of cryptographic operations are directly accessible on NVMs due to their inherent storage properties. We overcame this drawback by employing self-encryption, where the same NVM was used for 2 different purposes: as a memory to store data and as a PUF for retrieving the key to encrypt this data.
    • Principal Investigator at Young Scientist Project "Chaos-Based Secure Communication" (2022-2024)
      In the framework of this project, the implementation of circuits capable of chaotically encrypted, synchronised data transmission was performed. Based on its inherent expertise in the relevant scientific field, our research team had already published a limited number of preliminary works. However, our research had considered only relatively simple chaotic implementations, i.e., the Chua chaotic circuit, and a measurement setup for carbon nanotube implementations.
      In this project, we extended our collaborative research work both in the direction of more advanced security applications, with a focus on the potential use of such systems in the context of commercially available devices and products, as well as, towards the use of novel nanomaterials, e.g., memristors, or carbon nanotubes, for the implementation of the relevant chaotic circuits. In particular, we worked towards the following:
      • Characterisation of chaotic circuits based on commercially available novel nanomaterials, e.g., memristors.
      • Design and implementation of chaos-based systems for secure communication and other potentially more advanced security applications.
      • Experimental verification of the implemented devices, testing their robustness to environmental variations and noise.
      • Security evaluation and assessment, using attacker models suitable for the relevant commercial use cases, with an emphasis on a realistically acceptable level of security.
    • Principal Investigator at Young Scientist Project "Security Applications of Printed Electronics" (2025-2026)
      In the last years, printed electronics have been gaining attention due to their extremely low fabrication costs, their simple fabrication process, and their innate flexibility. The aforementioned properties of printed electronics make them a rather promising technology for the Internet of Things, whose wide adoption is based on low-cost devices that are manufactured under economies of scale. At the same time, the nature of the Internet of Things (IoT), which largely operates without human supervision or intervention, creates an urgent need for solutions and schemes that can enhance its security. To this end, due to their simple and low-cost fabrication process, printed electronics can serve as a viable solution for the integration of security solutions into the IoT, even in the form of dedicated mechanisms.
      Hence, in this project, we propose the implementation, testing, application, and evaluation of two different printed electronic components for security purposes in the context of the IoT. In particular, we propose the thorough examination of security solutions for the IoT, based on the following:
      • a printed memristor that can be utilised for the implementation of a novel dedicated secure communication system based upon the employment of state-of-the-art nonlinear circuits that produce chaotic oscillators, and
      • a printed ring oscillator that can be utilised for the implementation of a Physical Unclonable Function (PUF) – a security primitive that can act as a cryptographic anchor for the relevant device in which it is incorporated.

    Education

    • University of Passau, Passau, Germany (2024 to present)
      Habilitation, Computer Science
      Midterm evaluation potentially in 2026; final evaluation potentially in 2027-2028.
    • Technical University of Darmstadt, Darmstadt, Germany (2014-2022)
      Dr.-Ing., Computer Science
      Successfully graduated in September 2022.
    • Technical University of Berlin, Berlin, Germany (2012-2015)
      M.Sc., Innovation in Information and Communication Technology
      Successfully graduated in February 2015.
    • EIT ICT Labs, now EIT Digital (2012-2014)
      Certificate of Completion of EIT Labelled Education Programme, EIT ICT Labs Master School Programme in Security and Privacy
      Successfully graduated in November 2014.
    • University of Twente, Enschede, the Netherlands (2012-2014)
      M.Sc., Computer Science
      Successfully graduated in September 2014.
    • Aristotle University of Thessaloniki (Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης), Thessaloniki, Greece (2004-2012)
      B.Sc., Computer Science
      Successfully graduated in June 2012.
    • 2nd Experimental Higher Secondary School of Thessaloniki (2ο Πειραματικό Λύκειο Θεσσαλονίκης), Thessaloniki, Greece (2001-2004)
      Higher Secondary School Graduation Certificate
      Successfully graduated in 2004.
    • 1st Experimental Lower Secondary School of Thessaloniki (1ο Πειραματικό Γυμνάσιο Θεσσαλονίκης), Thessaloniki, Greece (1998-2001)
      Lower Secondary School Graduation Certificate
      Successfully graduated in 2001.
    • 90th Primary School of Thessaloniki (90ο Δημοτικό Σχολείο Θεσσαλονίκης), Thessaloniki, Greece (1996-1998)
      91th Primary School of Thessaloniki (91ο Δημοτικό Σχολείο Θεσσαλονίκης), Thessaloniki, Greece (1992-1996)
      Primary School Graduation Certificate
      Successfully graduated in 1998.