Jorge Sá Silva

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Wireless Sensor Networks are characterized by having specific requirements such as limited energy availability, low memory and reduced processing power. On the other hand, these networks have enormous potential applicability, e.g., habitat monitoring, medical care, military surveillance or traffic control. Many protocols have been developed for Wireless(More)
The Internet of Things (IoT) introduces a vision of a future Internet where users, computing systems, and everyday objects possessing sensing and actuating capabilities cooperate with unprecedented convenience and economical benefits. As with the current Internet architecture, IP-based communication protocols will play a key role in enabling the ubiquitous(More)
Multicast potentially optimises bandwidth consumption and node resources, when several users simultaneously participate in a communication session. Nevertheless, contrary to the expectations, IP multicast has not experienced widespread deployment, with the exception of IPTV. On the other hand, emerging Wireless Sensor Network (WSN) applications could(More)
Today's industrial facilities, such as oil refineries, chemical plants, and factories, rely on wired sensor systems to monitor and control the production processes. The deployment and maintenance of such cabled systems is expensive and inflexible. It is, therefore, desirable to replace or augment these systems using wireless technology, which requires us to(More)
In recent years, wireless sensor networks (WSNs) have been widely used in different domains. For instance, WSNs can be deployed in insecure and unattended environments. In this regard, user authentication is a critical issue for WSNs. In this paper, we propose a user authentication protocol in WSNs, which is variation of strong-password based solution(More)
Many issues still remain to be addressed in order to achieve acceptable security in Wireless Sensor Networks (WSNs). This necessity, together with the adoption of IPv6 on WSNs being defined at the 610wpan lvorking group of the IETF, motivates our investigation on the feasibility of the application of IPSec on sensor nodes. IPSec is already part of IPv6,(More)