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Fibonacci Conference (Patra 2008)
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Η μέθοδος του Chabauty και Ακέραια Σημεία επί Ελλειπτικών Καμπύλων (In Greek, Department of Mathematics, University of Ioannina; Ioannina, 18 Nov. 2008)
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Μέθοδοι Αλγεβρικής Γεωμετρίας με έμφαση στις Διοφαντικές Εξισώσεις ( In Greek, National Technical University of Athens; Athens, 27 Jan. 2009)
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Pell numbers of the form
$px^2.$ (3rd Internatonal Conference in Algebraic Informatics, 19-22 May 2009, Thessalolniki. -
Balanced Solutions of Linear Diophantine Equations, 7th Athens Colloquium on Algorithms and Complexity (ACAC12), 27-28 August, University of Athens, Athens.
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Balanced Solutions of Linear Diophantine Equations, 2nd International Conference on Applications of Mathematics and Informatics in Military Sciences (AMIMS), 11-12 April 2013, Hellenic Military Academy, Athens.
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Improved Knapsack Algorithms, 3rd International Conference on Cryptography, Cyber Security an Information Warfare (3rd CryCybIW), 26-27 May 2016, Hellenic Military Academy, Athens).
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Improved Knapsack Algorithms, 11th Athens Colloquium on Algorithms and Complexity (ACAC 2016), Athens, Greece.
9a. Elliptic curves and Cryptography, 90 years of Mathematics in AUTH, 19 & 20 December 2018, Aristotle University of Thessaloniki, Thessaloniki.
9b. Elliptic curves and cryptography [paper], a summary of the previous talk.
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Post Quantum Crypto, Invitation by ACM student chapter of AUTH, 20 May 2019
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Enhancing an Attack to DSA Schemes, CAI 2019, Serbia.
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Cybersecurity in quantum era, Sfhmmy 12, 23 April 2021, Thessaloniki.
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Introduction to the terminology of Blockchain. OK!Thess & Europe Direct Thessalonikis (invitation), Thessaloniki,
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Sagemath computer algebra system, 19/11/2022, Fosscomm 2022 (remote).
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Why the current encryption standards must be updated? The case of Post Quantum Cryptography., Sfhmmy 14, April 2023, Volos.