The interest in data provenance and trust has been increasing in the last years and the community is putting now a lot of effort in finding a standard model representation. The W3C provenance incubator group is focused on this area, analyzing different provenance models and making mappings between them and the Open Provenance Model (OPM)[1], which is the model they intend to make the standard. We want to develop a provenance system based in OPM and a trust algorithm from that provenance information. Our aim will be a platform that will not store the contents generated by the users, but it will store all the references to them, the opinions from the users, information from social networks, etc. to obtain semantic information from the Web. In this context, being able to predict the trust of a source or being able to track the content we’ve generated is a great choice for any user
This paper examines the impact of the cloud computing paradigm on enterprise IT structures. The first section of the paper defines the term cloud computing with the relevant aspects for this paper. In the second chapter the paper shows the potential of cloud computing for the enterprise IT. In the last section the paper will briefly reflect how the future development of infrastructure technologies will create more potential for enterprise IT cloud cases in the future.
Publish/Subscribe is often regarded as a promising paradigm for Future Internet architectures. Its information oriented nature and its particular security features have stimulated current research efforts which aim at applying publish/subscribe principles to a clean-slate Internet architecture. One of the core components of publish/subscribe architectures is the rendezvous network. Any security failure that a rendezvous network may face will probably jeopardize the operation of the whole (inter-)network. In this paper we highlight security requirements and potential security issues of rendezvous networks and we present security solutions that can be applied in order to shield them.
In order for a Future Internet architecture to be globally deployed, it must ensure that existing applications will continue to operate efficiently on top of it. As part of the Publish Subscribe Internet Routing Paradigm (PSIRP) project, we have explored various options for making endpoint centric applications based on the Sockets Application Programming Interface (API) compatible with the information centric PSIRP prototype implementation. We developed an emulator that mediates between the client/server socket calls and the publish/subscribe PSIRP calls, transforming the exchange of packets to distribution of publications. To assess the overhead of our emulator, we measure the execution time of a simple file transfer application in native socket mode, in emulated socket mode and in native publish/subscribe mode.
In the last few years, the concept of network virtualization has gained a lot of attention both from industry and research projects. This paper evaluates the potential of network virtualization from an operator's perspective, with the short-term goal of optimizing service delivery and rollout, and on a longer term as an enabler of technology integration and migration. Based on possible scenarios for implementing and using network virtualization, new business roles and models are examined. Open issues and topics for further evaluation are identified. In summary, the objective is to identify the challenges but also new opportunities for telecom operators raised by network virtualization.
This paper discusses the construction of a Global Semantic Graph (GSG) [1] to support future information- and collaboration-centric applications and services.TheGSGis a publish/subscribe (pub/sub) based architecture that supports publication of tuples and subscriptions with standing graph queries. We believe that an implementation of an efficient pattern matching algorithm such as Rete [2] on top of a distributed environment might serve as a possible substrate for GSG's pub/sub facility. Rete operates on loosely coupled alpha, beta and join nodes and therefore has been chosen by us for implementation in a distributed setting. In this paper, we propose a way to perform Rete's pattern matching over a DHT-based Structured P2P network to provide a scalable contentbased publish/subscribe service.
Malicious software (malware) infects large numbers of computers around the world. This malware can be used to promote unwanted products, disseminate offensive content, or provide unauthorized access to personal and financial information. Until recently mobile networks have been relatively isolated from the Internet, so there has been little need to protect them against Botnets. Mobile networks are now well integrated with the internet, so threats on the internet such as Botnets have started to migrate onto mobile networks. Botnets on mobile devices will probably appear very soon, there are already signs that this is happening. This paper studies the potential threat of Botnets based on mobile networks, and proposes the use of computational intelligence techniques to detect Botnets. We then simulate anomaly detection followed by an interpretation of the simulated values.
The Future Internet faces many challenges for new Internet architectures, protocols and services requiring early experimentation and testing in large-scale environments. Furthermore, the complexity of the software and technologies running on the Future Internet will require more innovative and different approaches to the testing process. This paper examines these requirements and challenges and demonstrates how they are dealt with in the Telecommunications Software and Systems Group using a case study of the Future Internet project; PERIMETER. Details of the testing and experimental methodologies and the role of testbed activities involved in this Quality of Experience network mobility project to develop and adapt to the needs of the Future Internet are provided. The paper concludes with observations of the further developments and innovations required to achieve an end-to-end solution for experimental testing in PERIMETER, and more generally for other Future Internet projects.
The Future Internet, has as its vision, the development of improved features and usability for services, applications and content. In many cases, services can be provided automatically through the use of monitors or sensors. This means web generated sensor data becoming available not only to the companies that own the sensors but also to the domain users who generate the data and to information and knowledge workers who harvest the output. The goal is improving the service through better usage of the information provided by the service. Applications and services vary from climate, traffic, health and sports event monitoring. In this paper, we present the WSW system that harvests web sensor data to provide additional and, in some cases, more accurate information using an analysis of both live and warehoused information.
One of the current barriers towards realizing the huge potential of Future Internet is the protection of sensitive information, i.e., the ability to selectively expose (or hide) information to (from) users depending on their access privileges. Given that RDF has established itself as the de facto standard for data representation over the Web, our work focuses on controlling access to RDF data. We present a high-level access control specification language that allows fine-grained specification of access control permissions (at triple level) and formally define its semantics. We adopt an annotation-based enforcement model, where a user can explicitly associate data items with annotations specifying whether the item is accessible or not. In addition, we discuss the implementation of our framework, propose a set of dimensions that should be considered when defining a benchmark to evaluate the different access control enforcement models and present the results of our experiments conducted on different Semantic Web platforms.
The G-Lab project aims to investigate concepts and technologies for future networks in a practical manner. Thus G-Lab consists of two major fields of activities: research studies of future network components and the design and setup of experimental facilities. Both is controlled by the same community to ensure, that the experimental facility fits to the demand of researchers. Researchers gain access to virtualized resources or may gain exclusive access to resource if necessary. We present the current setup of the experimental facility, describing the available hardware, management of the platform, the utilization of the Planet-Lab software and the user management.
Imagine what kind of applications become possible when our mobile devices not only present data but provide valuable information to other users. Users become able to instantaneously create services and to publish content and knowledge on their own mobile device, which can be discovered and accessed remotely by other mobile users in a simple way. To achieve the vision of customizable and context aware user-generated mobile services, we present a mobile authoring tool for end-users to create, customize and deploy mobile services while on-the-go. This tool is designed to allow users with different levels of technical expertise to create mobile services. The paper also gives insight on the performed usability evaluations, namely user interviews and an online survey.
Business applications are facing an increasing demand for being delivered as on-demand services. Service Level Agreements (SLAs) are a common way for specifying the exact conditions how services are delivered, both for business- and IT-based services. At the same time, the paradigm of service-orientation is expanded to different domains such as business and IT-based services. Services are composed out of other services across domains. Consequently, SLAs have to managed across such service hierarchies. In this paper, we present the lessons learned from applying a generic, multi-layer SLA management framework to the context of on-demand business applications. We explain the implemented architecture and show how a hierarchy of services can be managed via SLAs. We explain in detail how SLAs can be established for different layers and how SLA terms are translated across the service hierarchy.
This paper presents a non-strategic model for the end-system multicast networks based on the concept of replica exchange economy. We believe that microeconomics is a good candidate to investigate the problem of selfishness of the end-users (peers) in order to maximize the aggregate throughput. In this solution concept, the decisions that a peer might make, does not affect the actions of the other peers at all. The proposed mechanism tunes the price of the service in such a way that general equilibrium holds.
The combination of semantic technology and Web services in form of ’Semantic Web Services’ has until now been oriented towards extension of the WS-* stack with ontology-based descriptions. The same time, there is a strong movement away from this stack — for which the ’Web’ part is little more than branding — towards RESTful services. The Linked Open Data initiative is a keen adopter of this approach and exposes many datasets via SPARQL endpoints and RESTful services. Our developing approach of ’Linked Open Services’, whose current state is described in this paper, accommodates such Linked Data endpoints and general RESTful services alongside WS-* stack-based services with descriptions based on RDF and SPARQL. This capitalises on the Linked Data Cloud and makes service description and comprehension more easy and direct to the growing Linked Data community. Along the way, we show how the existing link between service messaging and the semantic viewpoint, commonly called ’lifting and lowering’, is usually unduly restricted to ontology-based classification and misses how the effect of a service contributes to the knowledge of its consumer. Our SPARQL-based approach helps also in the composition of services as knowledge-centric processes, and encourages the development and exposure of services that communicate RDF.
We investigate services giving users an adequate insight on his or her energy consumption habits in order to optimize it in the long run. The explored energy awareness services are addressed to inhabitants of smart homes, equipped with smart meters, advanced communication facilities, sensors and actuators. To analyze the potential of such services, a game at a social network Facebook has been designed and implemented, and the information about players’ responses and interactions within the game environment has been collected and analyzed. The players have had their virtual home energy usage visualized in different ways, and had to optimize the energy consumption basing on their own perceptions of the consumption information. Evaluations reveal, in particular, that users are specifically responsive to information shown as a real-time graph and as costs in Euro, and are able to produce and share with each other policies for managing their smart home environments.
Given the significant amount of personal information available on the Web, verifying its correct use emerges as an important issue. When personal information is published, it should be later used under a set of usage policies. If these policies are not followed, sensitive data could be exposed and used against its owner. Under these circumstances, processing transparency is desirable since it allows users to decide whether information is used appropriately. It has been argued that data provenance can be used as the mechanism to underpin such a transparency. Thereby, if provenance of data is available, processing becomes transparent since the provenance of data can be analysed against usage policies to decide whether processing was performed in compliance with such policies. The aim of this paper is to present a Provenance-based Compliance Framework that uses provenance to verify the compliance of processing to predefined information usage policies. It consists of a provenance-based view of past processing of information, a representation of processing policies and a comparison stage in which the past processing is analysed against the processing policies. This paper also presents an implementation using a very common on-line activity: on-line shopping.
We present the Information Workbench, an application for interacting with the Web of data. The Information Workbench manages large amounts of structured and unstructured information, which may be imported and integrated from existing sources, but also allows end users to annotate, complete and update information in a collaborative way. New paradigms for accessing information include hybrid search across the structured and unstructured data, keyword search combined with facetted search, as well as semantic query completion and interpretation, which assists the user in expressing complex information needs by an automated translation of keyword queries into hybrid queries. A Living UI based on widgets for the interaction with the data enables a homogeneous, seamless, continuous and personal experience. In our demonstrator system, users can explore, query and enrich information from the English Wikipedia augmented with structured data from the Open Linked Data Initiative including DBpedia and other sources.
