Short bio

I am a Lecturer and Researcher at the University of Yaoundé I.

I successfully completed my PhD in the same university, under the supervision of René Ndoundam and Alain Tchana.

After completing my doctoral studies, I was invited to join the Krakos team at LIG for two weeks.

My main research area is at the intersection of steganography and cloud computing, with a particular focus on data confidentiality. Thus, I study obfuscation methods that preserve the integrity of cover media to guarantee the undetectability of covert communications.

Throughout my academic journey, I had the pleasure of doing internships that have considerably enriched my expertise. Under the supervision of Rolf Kraemer, Head of the System Design Department at the IHP Laboratory of the Brandenburg University of Technology in Germany, I focused on the resilience of computer systems in real-time security-critical application scenarios. In addition, I collaborated with Alain Tchana in the MLNS2 team of the LIG, contributing to the proposal of a polynomial attack on one of the most recent cloud steganography systems and we then proposed PQHIDE, the first post-quantum steganography system based on error-correcting codes and exploiting cloud computing.

During my thesis I also had a part-time assistant position in the undergraduate cycle of the University of Yaoundé I. The courses taught include programming and cybersecurity.

Research interests: Security and confidentiality of communications; Data obfuscation techniques; Attack, detection and prevention; cloud computing.

More detailed information: My CV (last updated on November 2024)

Latest News
  • 11/24: Great pleasure to participate at the GDR SOC² workshop at TIMA, Grenoble INP
  • 11/24: Glad to participate at the thematic day “Virtualization of Systems and Networks” in the virtualization working group of the GdR RSD on the Pierre and Marie Curie campus of Sorbonne University
  • 11/24: Glad to participate and give a talk at the monthly meeting of the Krakos team
  • 11/24: Great pleasure to visit the LIG and the Krakos Team
  • 10/20: Glad to serve as External Reviewer at SN Computer Science
  • 09/24: Successfully defended my PhD thesis entitled “Steganography Resistant to Secret Detection Through the Preservation of Cover Media Integrity“
  • 12/23: Glad to participate and give a talk at The sixth edition of Conference on Research in Computer Science – CRI’2023
  • 10/22: Glad to participate and give a talk at the Sixteenth edition of the African Conference on Research in Computer Science and Applied Mathematics – CARI'2022
  • 07/19: Great pleasure to visit and give a talk at IHP Lab, for a workshop on the theme: Resilience of IT systems in critical application scenarios for real-time security.
Research projects
Resilience of IT systems in critical real-time application scenarios
During the execution of IT systems, there may be attacks that can degrade the execution of available services. The goal of the project is to propose detection mechanisms to identify any attack attempt and propose reaction mechanisms to deploy specific means to mitigate or inhibit any successful attempt.

DFG and ERASMUS+ project conducted at the IHP lab

Post-quantum steganography exploiting cloud computing
Recent developments raised the idea of doing steganography using cloud computing services; this is called Cloud Steganography. PQHIDE proposes a polynomial attack on one of the most recent Cloud Steganography system and the first post-quantum steganography system based on error-correcting codes and exploiting cloud computing

PQHIDE project conducted in the MLNS2 team of the LIG

Publications
List of publications

2024

Preprints, Working Papers

PQHIDE: A Post-Quantum Steganography System Exploiting Cloud Computing
Stephane Willy Mossebo Tcheunteu, Leonel Moyou Metcheka, Herve Tale Kalachi, Rene Ndoundam and Alain Tchana
IEEE Transactions on information forensics & security, Oct 2024, In Progress.

Theses

Steganography Resistant to Secret Detection Through the Preservation of Cover Media Integrity
Leonel Moyou Metcheka, University of Yaounde I, Cameroon, 2024.

Journal articles

Deux Schémas de Stéganographie Textuelles basés sur le codage des couleurs
Sadié, Juvet Karnel, Leonel Moyou Metcheka, and René Ndoundam
arima - Revue Africaine de Recherche en Informatique et Mathématiques Appliquées, octobre 2024, Volume 42 – Version Etendue du CRI 2023

2023

Conference papers

Two high capacity text steganography schemes based on color coding
Sadié, Juvet Karnel, Leonel Moyou Metcheka, and René Ndoundam
Conference on Research in Computer Science. Cham: Springer Nature Switzerland, 2023

2022

Conference papers

Two secure online steganography schemes based on HTTP request sequences
Leonel Moyou Metcheka, Stephane Gael Raymond Ekodeck, and René Ndoundam
African Conference on Research in Computer Science and Applied Mathematics – CARI'2022 ⟨hal-03706829⟩

2021

Journal articles

Distributed data hiding in a single cloud storage environment.
Mossebo Tcheunteu, Stéphane Willy, Leonel Moyou Metcheka, and René Ndoundam
Journal of Cloud Computing (2021)

2020

Journal articles

Distributed data hiding in multi-cloud storage environment
Leonel Moyou Metcheka, and René Ndoundam
Journal of Cloud Computing (2020)

Reviewing
Journal External Reviews: SN Computer Science
List of Talks
Teaching
  • Assistant, Cyber and Internet Security, Bachelor, ICT4D UY1, 2020-2024, 40h
  • Assistant, Introduction to Software Engineering, Bachelor, ICT4D UY1, 2020-2024, 40h
  • Assistant, Computer Forensic, Bachelor, ICT4D UY1, 2024, 20h
  • Assistant, Introduction to information security, Bachelor, ENSET Ebolowa, 2023, 24h
  • Assistant, Introduction to cryptography, Bachelor, ICT4D UY1, 2022-2024, 40h
  • Assistant, Programming in Java, Bachelor, Université des Montagnes (UdM), 2016-2017, 30h