Data Mining - Concepts and Techniques.

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Recent advances in electronics and wireless communication technologies have enabled the development of large-scale wireless sensor networks that consist of many low-power, low-cost, and small-size sensor nodes. Sensor networks hold the promise of facilitating large-scale and real-time data processing in complex environments. Security is critical for many sensor network applications, such as military target tracking and security monitoring. To provide security and privacy to small sensor nodes is challenging, due to the limited capabilities of sensor nodes in terms of computation, communication, memory/storage, and energy supply. In this article we survey the state of the art in research on sensor network security.

Security in wireless sensor networks

Major requirements for building Smart Homes in Smart Cities based on Internet of Things technologies

Security threats scenarios in trust and reputation models for distributed systems

Trust is considered as a fundamental aspect for interdomain relationships. We have reviewed existing trust models and their drawbacks when they are applied to pervasive environments. We present PTM, a new decentralised trust management model for pervasive computing environments. PTM overcomes the challenges posed by dynamic open environments, making use of the autonomy and cooperable behaviour of the entities. Our model facilitates ad-hoc trust relationships, captures entities dynamic behaviour along time, and allows trust information exchange through a recommendation protocol.

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PTM: A Pervasive Trust Management Model for Dynamic Open Environments ⁄

Alice first meets Bob in an entertainment shop, then, they wish to share multimedia content, but Do they know what are trustworthy users? How do they share such information in a secure way? How do they establish the permissions? Pervasive computing environments originate this kind of scenario, users with their personal devices interacting without need of wires, by forming ad-hoc networks. Such devices considered pervasive are having increasingly faster processors, larger memories and wider communication capabilities, which allows certain autonomy for collaborating and sharing resources. So, they require a suitable access control in order to avoid unauthorised access, or disclosure/modification of relevant information; in general, to protect the data that are usually confidential and the resources. This paper presents a distributed solution for access control, making use of the autonomy and cooperation capability of the devices, since in open dynamic environments is very difficult to depend on central server. The access control is based on a pervasive trust management model from which trust degrees are dynamically obtained. We present the TrustAC reference and functional model, as well as a prototype implementation using XACML-compliant policies.

TrustAC: trust-based access control for pervasive devices

In pervasive computing environments, mobile devices communicate via wireless links without requiring any fixed infrastructure. These devices must be able to discover and share services dynamically. In this paper, we propose a new service discovery middleware specifically designed for this kind of environments. This middleware is composed of a service discovery protocol, Pervasive Discovery Protocol (PDP), and a service description language, Generic Service Description Language (GSDL). PDP is a fully distributed protocol that merges characteristics of both pull and push solutions; it reduces power consumption of the most limited devices. GSDL is an XML based markup language that uses a hierarchical service description designed taking into account the specific requirements of pervasive environments.

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PDP and GSDL: a new service discovery middleware to support spontaneous interactions in pervasive systems

PDP: a lightweight discovery protocol for local-scope interactions in wireless ad hoc networks

In the last years, trust management has become a fundamental basis for facilitating the cooperation between different users in peer-to-peer (P2P) multimedia applications within autonomic networks. In these networks and applications, trust management should fulfill certain requirements (i.e. decentralisation, dynamism, simplicity, interoperability, etc.) for being functional. In this paper, we propose an evolutionary model of trust management that captures dynamic entities' behaviour over time. Likewise, we explain protection mechanisms against several attacks, which are based on the cooperative behaviour of the entities, trust relationship properties, and trust rules. Finally, we successfully validate our model from several scenarios and compare it with other proposals in this field.

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Papers

PTM: A Pervasive Trust Management Model for Dynamic Open Environments ⁄

TrustAC: trust-based access control for pervasive devices

PDP and GSDL: a new service discovery middleware to support spontaneous interactions in pervasive systems

PDP: a lightweight discovery protocol for local-scope interactions in wireless ad hoc networks

Trust management for multimedia P2P applications in autonomic networking