Panagiotis M. Grontas

Panagiotis M. Grontas

Computer Science Teacher and Researcher

Papers

Cryptography :lock:

Journals :: :books:

  1. Grontas, P., Pagourtzis, A.
    Anonymity and everlasting privacy in electronic voting.
    Int. J. Inf. Secur. 22, 819–832 (2023).ISSN: 1615-5270.
    https://doi.org/10.1007/s10207-023-00666-2

  2. Grontas, P., Pagourtzis A., Zacharakis A., Zhang B.
    Publicly auditable conditional blind signatures.
    Journal of Computer Security. 2021;29(2):229-271. ISSN:0926-227X.
    http://dx.doi.org/10.3233/JCS-181270.

  3. Grontas, P., Pagourtzis A. (2019).
    Blockchain, consensus, and cryptography in electronic voting.
    Homo Virtualis, 2(1), 79-100. ISSN: 2585-3899.
    http://dx.doi.org/10.12681/homvir.20289.

Conferences :hotel:

  1. Papadoulis, G., Balla, D., Grontas, P., Pagourtzis, A. (2025).
    AQQUA: Augmenting Quisquis with Auditability.
    In: Fischlin, M., Moonsamy, V. (eds) Applied Cryptography and Network Security.
    ACNS 2025. Lecture Notes in Computer Science, vol 15826. Springer, Cham.
    ISBN: 978-3-031-95764-2.
    https://doi.org/10.1007/978-3-031-95764-2_12
    Expanded version: Cryptology ePrint Archive Report 2024/1181

  2. Balla, D., Behrouz, P., Grontas, P., Pagourtzis, A., Spyrakou, M., Vrettos, G. (2022).
    Designated-Verifier Linkable Ring Signatures with Unconditional Anonymity.
    In: Poulakis, D., Rahonis, G. (eds) Algebraic Informatics. CAI 2022. Lecture Notes in Computer Science, vol 13706. Springer, Cham.
    ISBN: 978-3-031-19685-0.
    https://doi.org/10.1007/978-3-031-19685-0_5
    Expanded version: Cryptology ePrint Archive Report 2022/1138

  3. Behrouz, P., Grontas, P., Konstantakatos, V., Pagourtzis, A., Spyrakou, M. (2022).
    Designated-Verifier Linkable Ring Signatures.
    In: Park, J.H., Seo, S.H. (eds) Information Security and Cryptology. ICISC 2021.
    Lecture Notes in Computer Science, vol 13218. Springer, Cham.
    ISBN: 978-3-031-08896-4.
    https://doi.org/10.1007/978-3-031-08896-4_3
    Expanded version: Cryptology ePrint Archive Report 2022/470

  4. Behrouz, P., Grontas, P., Spyrakou, M. (2020).
    On coercion resistance in decentralized voting (Extended Abstract).
    In: 1st International Workshop on Foundations of Consensus and Distributed Ledgers (FOCODILE 2020), June 19, 2020.
    pdf

  5. Grontas, P., Pagourtzis, A., Zacharakis, Α. (2019).
    Security models for everlasting privacy.
    In: 4th International Joint Conference on Electronic Voting (E-Vote-ID 2019), 1–4 October 2019, Lochau Bregenz, Austria.
    Taltech Press, pp. 152–166. ISBN: 978-9949-83-473-0.
    Expanded version: Cryptology ePrint Archive Report 2019/1193

  6. Grontas, P., Pagourtzis, A., Zacharakis, A., Zhang, B. (2019).
    Towards Everlasting Privacy and Efficient Coercion Resistance in Remote Electronic Voting.
    In: Zohar, A., et al. Financial Cryptography and Data Security.
    FC 2018. Lecture Notes in Computer Science, vol 10958. Springer, Berlin, Heidelberg.
    ISBN: 978-3-662-58820-8.
    https://doi.org/10.1007/978-3-662-58820-8_15
    Expanded version: Cryptology ePrint Archive Report 2018/215

  7. Grontas, P., Pagourtzis, A., Zacharakis, A. (2017).
    Coercion Resistance in a Practical Secret Voting Scheme for Large Scale Elections.
    In: 2017 14th International Symposium on Pervasive Systems, Algorithms and Networks &
    2017 11th International Conference on Frontier of Computer Science and Technology &
    2017 Third International Symposium of Creative Computing (ISPAN-FCST-ISCC), Exeter, 2017, pp. 514–519.
    ISSN: 2375-527X, ISBN: 978-1-5386-0840-1.
    http://dx.doi.org/10.1109/ISPAN-FCST-ISCC.2017.79

  8. Zacharakis, A., Grontas, P., Pagourtzis, A. (2017).
    Conditional Blind Signatures.
    In: 7th International Conference on Algebraic Informatics (CAI 2017).
    Expanded version: Cryptology ePrint Archive Report 2017/682

Preprints - Working papers :bookmark_tabs:

Books :closed_book:

  1. Ζάχος, Ε., Παγουρτζής, Α., Γροντάς, Π. (2016).
    Υπολογιστική Κρυπτογραφία [ηλεκτρονικό βιβλίο].
    Σύνδεσμος Ελληνικών Ακαδημαϊκών Βιβλιοθηκών, Αθήνα 2015.
    ISBN: 978-960-603-276-9.
    https://repository.kallipos.gr/handle/11419/5439

Education :school: (in greek)

  1. Γροντάς, Π. (2019).
    Η εύρεση μέγιστου στοιχείου ως ολοκληρωμένο παράδειγμα εφαρμογής υπολογιστικής σκέψης.
    11ο Συνέδριο για την Πληροφορική στην Εκπαίδευση, (σσ. 436–445), ΕΠΥ 2019.
    ISBN: 978-960-578-058-6.
    pdf

  2. Γροντάς, Π. (2016).
    Μία πρόταση διδασκαλίας για την ανταλλαγή Κλειδιού Diffie-Hellman.
    8ο Συνέδριο για την Πληροφορική στην Εκπαίδευση, (σσ. 436–445), ΕΠΥ 2016.
    ISBN: 978-960-578-023-4.
    pdf

  3. Βραχνός, Ε., Γροντάς, Π., Ντζιός, Κ., Παπαργύρης, Γ. (2010).
    Η αλγοριθμική φιλοσοφία του μαθήματος «Ανάπτυξη Εφαρμογών σε Προγραμματιστικό Περιβάλλον».
    Περιέχεται στο συλλογικό τόμο Ανάπτυξη Εφαρμογών σε Προγραμματιστικό Περιβάλλον, Παρελθόν, Παρόν, Μέλλον,
    Εκδόσεις Νέων Τεχνολογιών (2010).
    ISBN: 978-960-675-952-9.
    pdf

Theses :office:

  1. PhD Thesis. Privacy-oriented cryptographic primitives and protocols for electronic voting. NTUA. 2020. pdf

  2. MSc Thesis. Secure multi-party computations for electronic voting. UoA. 2014. pdf

  3. MSc Thesis. Electronic signatures and accreditation of certification service providers. AUEB. 2002. pdf (in greek)

  4. BSc Thesis. Load management in distributed object systems. UniPi. 2000. pdf (in greek)