First Training Event

HellasQCI > First Training Event

First Training Event

Connect online via DIAVLOS GRNET’s web livestream channel here:

1st Day Training - September 18th, 2023

Welcoming Session

(In this session spoken Language will be Greek)

Moderator: Yannis Rizopoulos, Journalist, Boussias Media

Location: NTUA Zografou Campus Multimedia Amphitheatre on the basement of the NTUA Central Library


09:00 – 09:10Welcoming Remarks by Prof. Konstantinos Karantzalos, Secretary General of Telecommunications & Posts,
Hellenic Ministry of Digital Governance
09:10 – 09:20Welcoming Remarks by Prof. Stefanos Kollias,
Chairman of the Board of Directors GRNET S.A.
09:20 – 09:25Welcoming Remarks by the European Commission
(video message)
09:25 – 09:40Keynote speech “Quantum Technologies - QKD Landscape in Europe” by Dr. Eleni Diamanti,
CNRS research director at Sorbonne University in Paris
09:40 – 09:50“HellasQCI project overview and synergies with EuroQCI”
by Dr. Ilias Papastamatiou, HellasQCI Project Coordinator,
09:50 – 09:55“Overview of Four Day HellasQCI Training”
by Prof. Konstantinos Vyrsokinos,
Aristotle University of Thessaloniki - AUTH
09:55 – 10:10Q&A
10:10 – 10:25Coffee Break

Second Session:

(Spoken Language will be English)

 Moderator: Yiannis Yianoulis, NTUA

Location: NTUA Zografou Campus Multimedia Amphitheatre on the basement of the NTUA Central Library


10:25 – 11:00Eleni Diamanti, CNRS CNRS research director at Sorbonne University in Paris
Plenary Session
11:00 – 11:30George Nikolopoulos, FORTH
Basic Principles of QKD
11:30 – 12:15Konstantinos Vyrsokinos, AUTH
12:15 – 13:00George Kanellos, NKUA
QKD Networks
13:00 – 14:00Lunch Break
14:00 – 14:45Giannis Giannoulis, NTUA/GRNET
From billion photons to single photon experimental setups
14:45 – 15:05Ilias Balampanis, Space Hellas SA
QKD with Raspberry PI’s as encryptors/decryptors
15:05 – 15:30Homer Papadopoulos, NCSRD
QKD with PQC for a Healthcare use case
15:30 – 15:45Deirdre Kilbane, WIT
15:45 – 16:00Konstantinos Katzis, EUC
16:00 – 16:15Piotr Rydlichowski, PSNC
16:15-16:45Conclusions and Discussion (Q&A)

2nd Day Training - September 19th, 2023

(Spoken Language will be English)

 Moderator: Konstantinos Vyrsokinos, AUTH

Location: NTUA Zografou Campus, Multimedia Amphitheatre on the basement of the NTUA Central Library


09:00 – 10:00Aris Stathis, Argiris Ntanos, NTUA/GRNET
Theoretical background and equipment description for hands-on experiments
10:00 – 10:45Nikos Lyras, Argiris Ntanos, NTUA/GRNET
QKD in Space, satellite-to-ground QKD links
10:45 -11:00Coffee Break

Change Room: Photonics Communications Research Laboratory (PCRL)


11:00 -13:00

Hands On Experience @ NTUA

Operating Principle of Single Photon Avalanche Detectors (SPAD)

Coherent Light: Poissonian Photon statistics and single photon interference

Generation, transmission and detection of encoded single-photons over a dark fiber

Transmission and detection of single- photons over free space

Coexistence of classical and quantum signals over converged fiber/FSO link

13:00 – 14:00Lunch Break
14:00 – 17:00

Hands-On Experience @ NKUA

Optical Communications and Photonics Technology Laboratory (Room Y2)

National and Kapodistrian University of Athens
Department of Informatics and Telecommunications
Panepistimiopolis, Ilisia
Athens, 16122

We are excited to announce a dynamic two-day training event focused on Cybersecurity with Quantum Key Distribution (QKD) Systems and Post-Quantum Cryptography (PQC) in the frames of HellasQCI project! This comprehensive training program will equip you with the skills and insights needed to navigate the evolving landscape of cybersecurity and harness the power of quantum-safe encryption and the PQC algorithms.

Key Highlights:

  • Learn the principles of cryptography, including asymmetric (e.g., RSA, DH) and symmetric (e.g., AES, OTP) cryptosystems and understand their security against both classical and quantum computers.
  • Deep dive into the principles and concepts and the fundamental principles underlying the most widely used QKD protocols providing an overview of their implementation, the threat model, and the path that the QKD promises to deliver quantum safe encryption.
  • overview of the implementation of QKD systems, emphasizing on the integration of QKD solutions into the existing cryptographic infrastructure.
  • Explore the synergy between QKD systems and PQC for enhanced cybersecurity and their potential integration into existing cryptosystems
  • Understand the challenges and strategies for implementing quantum-safe cryptographic solutions.
  • Discuss scientific and technological challenges related to QKD and PQC integration in practical deployments.
  • Monitor relevant standardisation efforts (e.g., NIST) as well as regulatory initiatives and their synergies/impact on the deployed QKD systems.
  • Discover practical approaches to integrating QKD and PQC into existing security frameworks.
  • Engage in hands-on exercises and case studies that will include the incorporation of QKD to provable secure algorithms such as OTP, as well the integration of QKD into existing symmetric cryptographic infrastructures (e.g., AES).

At the end of the workshop the trainees will be able to use the QKD infrastructure and will be able to understand the basic concepts that underlie its operation.

Who Should Attend:

  • Cybersecurity professionals seeking to strengthen their expertise in quantum-safe solutions.
  • IT managers and engineers responsible for securing sensitive data.
  • Security and IT experts working on cryptosystems
  • Researchers, students and practitioners in the field of post-quantum cryptography.
  • Decision-makers interested in future-proofing their organization's security infrastructure.

Date: September 21st and 22nd, 2023

Location: National Technical University of Athens

Secure your spot now for this two-day training event and stay ahead of the cybersecurity curve with quantum-resistant solutions!

3rd Day Training - September 21st, 2023: Introduction to cryptography
Lectures and hands on experience

(Spoken Language will be English)

Moderator: Harry Manifavas, FORTH

Location: NTUA Zografou Campus Multimedia Amphitheatre on the basement of the NTUA Central Library


09:00 - 09:15Welcome Session
09:15 – 10:15

Harry Manifavas, FORTH

Cybersecurity and the role of Cryptography
The Weakest Link Property
The Adversarial Setting
Cryptography Pitfalls
Security and Other Design Criteria
Security Strength levels

10:15 - 11:00

Harry Manifavas, FORTH

Basic cryptographic primitives
Symmetric Cryptography
Public Key Cryptography
Cryptographic Hash Functions
Applications of cryptography in real life

11:00 – 11:15Coffee Break
11:15 – 12:00

Harry Manifavas, FORTH

Cryptographic Attacks and Failures
Ciphertext-Only and Known-Plaintext Attacks
Brute Force Attack
Cryptographic key length Recommendations
Public Key Algorithms Security
The Factoring Problem
Man-in-The-Middle and Replay Attacks
Cryptographic Failures: Case Studies

12:00 - 13:00

Emmanouil Papadogiannakis, FORTH


Attacking a social network

Bypassing authentication

13:00- 14:00Lunch Break
14:00 – 17:00

Emmanouil Papadogiannakis, FORTH

Practice session: labs and exercises

Exploiting cryptographic failures

Cipher misuse

Crypto misconfiguration

CrypTool 2.1 (Stable Build 9589.1),
VirtualBox 7.0.10,

Download the VV:

4th Day Training - September 22nd, 2023: Introduction to Post Quantum Cryptography and Quantum Key Distribution

Lectures and hands on experience

(Spoken Language will be English)

 Moderator: Homer Papadopoulos, NCSRD

Location: NTUA Zografou Campus Multimedia Amphitheatre on the basement of the NTUA Central Library


09:00 – 10:00

Harry Manifavas, FORTH

Introduction to Post-Quantum Cryptography
Quantum Computing Threat Landscape for Symmetric and Public-Key
Challenges: Retrospective Decryption, Shor’s and Grover’s Algorithms
Quantum Computing Threat Mitigation
Post-quantum Cryptography
NIST PQC Standardization Effort
PQC Transition Recommendations and Cryptographic Agility

10:00 – 11:00

Harry Manifavas, FORTH

Introduction to QKD
Quantum Cryptography and Quantum Encryption
QKD Use Cases
QKD Requirements, Security and Protocols
Attacks and Limitations
Challenges and Criticism
Quantum Random Number Generators

11:00 – 11:15Coffee Break
11:15 – 12:00

Homer Papadopoulos, NCSRD

Integrating QKD into the existing Cryptographic Landscape: Addressing Challenges in Practical Deployments of QKD and Quantum-Safe Cryptography, and Exploring Current Trends

QKD standardization efforts and challenges


12:00 - 13:00

Antonis Korakis, George Balaskas, Homer Papadopoulos NCSRD


Extract keys from a QKD device.

Digital signatures with PQC algorithms

Encrypt files with PQC algorithms

Enable computations on encrypted data without decryption.

13:00- 14:00Lunch Break
14:00 – 17:00

Antonis Korakis, George Balaskas, Homer Papadopoulos NCSRD

Practice session: labs and exercises

Walk through step-by-step instructions for setting up the encryptor and key retrieval from the QKD device. Encrypt your files with AES 256.

Set up your own digital signatures using PQC Dilithium library to authenticate yourself to the encryptor.

Encrypt your files with PQC Kyber's encryption methods to access the encryptor.

Learn the Homomorphic techniques for encrypting your files, enabling secure cloud computations, while maintaining complete data encryption

Organizers of both events in the framework of the HellasQCI project


  • GRNET S.A.
  • National Technical University of Athens, Electrical and Computer Engineering Department
  • Aristotle University of Thessaloniki, School of Physics
  • National Kapodistrian University of Athens, Department of Informatics and Telecommunications
  • Foundation for Research and Technology, Hellas
  • National Centre for Scientific Research “Demokritos”
  • Space Hellas S.A.

Directions of how to get to the location of the event:

🚗 By Car:

🗺️ Directions:

🚇 By Metro:

Catch the blue line to Katehaki stop (30’ walk from Campus). From there, you can hop on bus lines 242, which takes you directly into the Campus, or 140, which leaves you outside the Campus. Alternatively, you can also take the same METRO line to the Evaggelismos stop and catch bus line 608 until the 8th stop Zografou.

🚌 By Bus:

  • Line 608: Galatsi - Akademia - Necr. Zografou. Get off at the 8th stop of Zografou and walk to the Zografou Gate (9 Iroon Polytehniou).
  • Line 230: Acropolis - Zografou. Same as above, get off at the 8th stop and walk to the Zografou Gate (9 Iroon Polytehniou)..
  • Line 242: Katehaki Metro Station – NTUA Zografou Campus (Circular). The 242 bus line takes a circular route around the campus periphery, and the library is located at the center of the campus.
  • Line 140: Polygon - Glyfada. This bus starts at Evelpidon Courthouses and stops at the "lower" gate, near the intersection of Katehaki and Kokkinopoulou streets.

To find a detailed map and directions to the Multimedia Amphitheatre (basement of the NTUA Central Library):

The route from the Katehaki entrance to the conference hall:

From the Katehaki Gate, proceed straight ahead. When you reach the shed turn right into the downhill road that leads to an underground parking lot. Once the downhill is over, on your righthand side is the entrance to the library, where the hall is located.

Thank you for your interest in attending this training event and we are looking forward to welcoming you there.

Contact details: Mrs Poly Vlassi, Tel: +306936 779129, email:

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