Supervision : Thi-Mai-Trang NGUYEN

Co-supervision : PUJOLLE Guy

Blockchain application for Mesh and Ad hoc networks

Blockchain is a technology that makes it possible to maintain a single register of information in a distributed and decentralized way. However, to benefit from it, it is necessary to rely on reliable connectivity as provided by the Internet. This is not the case in mesh and mobile ad hoc networks because it is often required to deploy its own infrastructure and its own services where operators are not available. In this thesis, we propose Blockgraph, a blockchain-like technology capable of dealing with network partitions. With mobility, partitions in the network result in forks which are traditionally resolved by choosing the longest chain and ignoring other competing chains. We have developed a new data structure that takes the form of a directed acyclic graph, which inherits all the security properties of the blockchain. In Blockgraph, these concurrent chains created by the effect of network partitions are considered legitimate chains carrying information related to a given network partition. We also proposed C4M, a consensus algorithm inspired by RAFT, able to be tolerant to network partitions by performing node membership changes automatically.

2020-2023 Publications

• 2023
  • D. Cordova Morales, Th.‑M.‑T. Nguyen, G. Pujolle : “Towards a Blockgraph-Based Trustless Authentication Scheme for Future 6G Technology”, Proceedings of the 2023 2^nd International Conference on 6G Networking (6GNet), Paris, France, pp. 1-4, (IEEE), (ISBN: 979-8-3503-0673-6) (2023)
  • D. Córdova Morales, Ah. Wazan, D. Chadwick, R. Laborde, A. Rains Reyes Maramara, K. Cabral : “ACME Protocol to Automate the Management of All X.509 Web Certificates”, Proceedings IFIP SEC 2023, Poznan, Poland (2023)
• 2022
  • D. Córdova Morales : “Blockchain application for Mesh and Ad hoc networks”, thesis, phd defence 11/30/2022, supervision Nguyen, Thi-Mai-Trang, co-supervision : Pujolle, Guy (2022)
  • D. Cordova Morales, P. Velloso, A. Laube, Th.‑M.‑T. Nguyen, G. Pujolle : “A performance evaluation of C4M consensus algorithm”, Annals of Telecommunications - annales des télécommunications, (Springer) (2022)
  • D. Cordova Morales, Th.‑M.‑T. Nguyen, P. Braconnot‑Velloso, G. Pujolle : “A Preliminary Assessment of Blockgraph - a Mobility-Aware Solution to Secure 6G Mesh Networks”, 2022 1^st International Conference on 6G Networking (6GNet), Paris, France, pp. 1-4, (IEEE) (2022)
  • D. Córdova Morales, P. Braconnot‑Velloso, A. Guerre, Th.‑M.‑T. Nguyen, G. Pujolle, Kh. Al Agha, G. Dua : “Blockgraph : une Structure de Type Blockchain Tolérante aux Partitions pour les MANET”, RESSI 2022 : Rendez-vous de la Recherche et de l'Enseignement de la Sécurité des Systèmes d'Information, Chambon-sur-Lac, France (2022)
• 2021
  • D. Cordova Morales, P. Velloso, A. Laube, Th.‑M.‑T. Nguyen, G. Pujolle : “C4M: A Partition-Robust Consensus Algorithm for Blockgraph in Mesh Network”, 2021 5^th Cyber Security in Networking Conference (CSNet), Abu Dhabi, United Arab Emirates, pp. 82-89, (IEEE) (2021)
  • P. Braconnot‑Velloso, D. Cordova Morales, Th.‑M.‑T. Nguyen, G. Pujolle : “State of the art: Cross chain communications”, 2021 5^th Cyber Security in Networking Conference (CSNet), Abu Dhabi, United Arab Emirates, pp. 76-81, (IEEE) (2021)
  • D. Cordova Morales, P. Velloso, A. Guerre, Th.‑M.‑T. Nguyen, G. Pujolle, Kh. Alagha, G. Dua : “Blockgraph proof-of-concept”, SIGCOMM '21: Proceedings of the SIGCOMM '21 Poster and Demo Sessions, Virtual Event, United States, pp. 82-84, (ACM) (2021)
• 2020
  • D. Cordova, A. Laube, Th.‑M.‑T. Nguyen, G. Pujolle : “Blockgraph: A Blockchain for Mobile Ad Hoc Networks”, 4^th Cyber Security in Networking Conference, Lausanne, Switzerland (2020)