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Detalhes

Detalhes

  • Nome

    João Marco
  • Cluster

    Informática
  • Cargo

    Investigador Auxiliar
  • Desde

    22 dezembro 2016
002
Publicações

2021

Towards a bottom-up approach to inclusive digital identity systems

Autores
Silva, JM; Fonte, V; Sousa, A;

Publicação
ACM International Conference Proceeding Series

Abstract
The path towards the United Nations objective of providing legal identity for all, including free birth registrations, has been facing several challenges. Particularly, the diversity of social realities, limited ICT infrastructures, inadequate legal frameworks, and unstable political engagement have resulted in solutions highly fitted to a specific scenario, thus hard to be replicated in different regions. Paired with noncomprehensive public services of civil registration, these aspects impact the way identity records are created, stored and used by citizens in their daily interactions. To tackle these impairments, this work introduces IDINA, a non-authoritative approach aiming at a community-oriented identification system underpinned by relations of social trust, inclusiveness, and the use of cutting-edge accessible technologies. © 2021 Owner/Author.

2021

An Outlook on using Packet Sampling in Flow-based C2 TLS Malware Traffic Detection

Autores
Novo, C; Silva, JMC; Morla, R;

Publicação
12th International Conference on Network of the Future, NoF 2021, Coimbra, Portugal, October 6-8, 2021

Abstract

2021

Balancing the Detection of Malicious Traffic in SDN Context

Autores
Machado, BS; Silva, JMC; Lima, SR; Carvalho, P;

Publicação
12TH INTERNATIONAL CONFERENCE ON UBIQUITOUS AND FUTURE NETWORKS (ICUFN 2021)

Abstract
Huge efforts and resources are spent every year on prevention and recovery of cyberattacks targeting users, services and network infrastructures. Software-Defined Networking (SDN) is a technology providing advances to the field of security with the ability of programming the network, promoting highperformance solutions and efficient resource utilization at low costs, as the use of specialized hardware is avoided. The present paper aims at exploring the SDN paradigm to develop an SDN-based framework for prevention and mitigation of malicious attacks throuhgt the network. The framework design and proposal has concerns regarding the efficient use of network and computational resources, distributing the inspection of suspicious flows by distinct Intrusion Detection Systems. For this purpose, a load-balancing strategy for traffic inspection is devised, allowing to balance both the usage of resources and the analysis of traffic flows. In this way, this paper also sheds light on the usage of OpenFlow messages to build distributed SDN-based applications with the mentioned properties. © 2021 IEEE.

2020

e-LiteSense: Self-adaptive energy-aware data sensing in WSN environments

Autores
Silva, JM; Carvalho, P; Bispo, KA; Lima, SR;

Publicação
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS

Abstract
Currently deployed in a wide variety of applicational scenarios, wireless sensor networks (WSNs) are typically a resource-constrained infrastructure. Consequently, characteristics such as WSN adaptability, low-overhead, and low-energy consumption are particularly relevant in dynamic and autonomous sensing environments where the measuring requirements change and human intervention is not viable. To tackle this issue, this article proposes e-LiteSense as an adaptive, energy-aware sensing solution for WSNs, capable of auto-regulate how data are sensed, adjusting it to each applicational scenario. The proposed adaptive scheme is able to maintain the sensing accuracy of the physical phenomena, while reducing the overall process overhead. In this way, the adaptive algorithm relies on low-complexity rules to establish the sensing frequency weighting the recent drifts of the physical parameter and the levels of remaining energy in the sensor. Using datasets from WSN operational scenarios, we prove e-LiteSense effectiveness in self-regulating data sensing accurately through a low-overhead process where the WSN energy levels are preserved. This constitutes a step-forward for implementing self-adaptive energy-aware data sensing in dynamic WSN environments. © 2019 John Wiley & Sons, Ltd.

2020

Towards a holistic semantic support for context-aware network monitoring: An ontology-based approach

Autores
Carvalho, P; Lima, SR; Sabucedo, LA; Santos Gago, JM; Silva, JMC;

Publicação
COMPUTING

Abstract
Monitoring current communication networks and services is an increasingly complex task as a result of a growth in the number and variety of components involved. Moreover, different perspectives on network monitoring and optimisation policies must be considered to meet context-dependent monitoring requirements. To face these demanding expectations, this article proposes a semantic-based approach to support the flexible configuration of context-aware network monitoring, where traffic sampling is used to improve efficiency. Thus, a semantic layer is proposed to provide with a standard and interoperable description of the elements, requirements and relevant features in the monitoring domain. On top of this description, semantic rules are applied to make decisions regarding monitoring and auditing policies in a proactive and context-aware manner. Use cases focusing on traffic accounting and traffic classification as monitoring tasks are also provided, demonstrating the expressiveness of the ontology and the contribution of smart SWRL rules for recommending optimised configuration profiles. © 2020, Springer-Verlag GmbH Austria, part of Springer Nature.

Teses
supervisionadas

2020

A blockchain à luz da proteção de dados na promoção de transparência contra a corrupção na administração pública

Autor
Lucas Silvestre Cortizo

Instituição
UM

2020

AntiEgo: Protocolo Nash Equilibrium para Redes Ad Hoc com comportamentos Racionais

Autor
Paulo Jorge Machado Guedes

Instituição
UM

2019

Energy-aware gossip protocol for Wireless Sensor Networks

Autor
Bruno Chianca Ferreira

Instituição
UM

2019

O uso de tecnologias (DLT) como ferramenta para a proteção de direitos de autor

Autor
Luís Felipe Miranda Ramos

Instituição
UM

2019

Load Balancing Framework for Security in SDN context

Autor
Bruno Machado

Instituição
UM