Web services security: A proposed architecture for interdomain trust relationship

Thesis (Master)--Izmir Institute of Technology, Computer Engineering, Izmir, 2006Includes bibliographical references (leaves: 49)Text in English; Abstract: Turkish and Englishix, 68 leavesWeb services technology is vulnerable to security threats similar to other technologies which are based on communication over internet. Some applications working over internet typically require strong authentication. The security requirements of a scenario may involve interdomain authentication mechanisms. These domains may be operating using different technologies. In order to enable such scenarios, we leverage existing approaches with emerging standards and propose an architecture. Our proposed architecture takes advantage of XML technology and emerging SAML standard. The most important aim of the proposed architecture is platform indepedence. Our proposed architecture includes a Security Token Service and a protocol for communication between token requesters, consumers and issuers. Although, the exact flow of execution depends on the scenario, we believe our approaches can be used as common ground for implementation

Applications of Internet of Things

This book introduces the Special Issue entitled “Applications of Internet of Things”, of ISPRS International Journal of Geo-Information. Topics covered in this issue include three main parts: (I) intelligent transportation systems (ITSs), (II) location-based services (LBSs), and (III) sensing techniques and applications. Three papers on ITSs are as follows: (1) “Vehicle positioning and speed estimation based on cellular network signals for urban roads,” by Lai and Kuo; (2) “A method for traffic congestion clustering judgment based on grey relational analysis,” by Zhang et al.; and (3) “Smartphone-based pedestrian’s avoidance behavior recognition towards opportunistic road anomaly detection,” by Ishikawa and Fujinami. Three papers on LBSs are as follows: (1) “A high-efficiency method of mobile positioning based on commercial vehicle operation data,” by Chen et al.; (2) “Efficient location privacy-preserving k-anonymity method based on the credible chain,” by Wang et al.; and (3) “Proximity-based asynchronous messaging platform for location-based Internet of things service,” by Gon Jo et al. Two papers on sensing techniques and applications are as follows: (1) “Detection of electronic anklet wearers’ groupings throughout telematics monitoring,” by Machado et al.; and (2) “Camera coverage estimation based on multistage grid subdivision,” by Wang et al

Security and Privacy in the Internet of Things

The Internet of Things (IoT) is an emerging paradigm that seamlessly integrates electronic devices with sensing and computing capability into the Internet to achieve intelligent processing and optimized controlling. In a connected world built through IoT, where interconnected devices are extending to every facet of our lives, including our homes, offices, utility infrastructures and even our bodies, we are able to do things in a way that we never before imagined. However, as IoT redefines the possibilities in environment, society and economy, creating tremendous benefits, significant security and privacy concerns arise such as personal information confidentiality, and secure communication and computation. Theoretically, when everything is connected, everything is at risk. The ubiquity of connected things gives adversaries more attack vectors and more possibilities, and thus more catastrophic consequences by cybercrimes. Therefore, it is very critical to move fast to address these rising security and privacy concerns in IoT systems before severe disasters happen. In this dissertation, we mainly address the challenges in two domains: (1) how to protect IoT devices against cyberattacks; (2) how to protect sensitive data during storage, dissemination and utilization for IoT applications. In the first part, we present how to leverage anonymous communication techniques, particularly Tor, to protect the security of IoT devices. We first propose two schemes to enhance the security of smart home by integrating Tor hidden services into IoT gateway for users with performance preference. Then, we propose a multipath-routing based architecture for Tor hidden services to enhance its resistance against traffic analysis attacks, and thus improving the protection for smart home users who desire very strong security but care less about performance. In the second part of this dissertation, we explore the solutions to protect the data for IoT applications. First, we present a reliable, searchable and privacy-preserving e-healthcare system, which takes advantage of emerging cloud storage and IoT infrastructure and enables healthcare service providers (HSPs) to realize remote patient monitoring in a secure and regulatory compliant manner. Then, we turn our attention to the data analysis in IoT applications, which is one of the core components of IoT applications. We propose a cloud-assisted, privacy-preserving machine learning classification scheme over encrypted data for IoT devices. Our scheme is based on a three-party model coupled with a two-stage decryption Paillier-based cryptosystem, which allows a cloud server to interact with machine learning service providers (MLSPs) and conduct computation intensive classification on behalf of the resourced-constrained IoT devices in a privacy-preserving manner. Finally, we explore the problem of privacy-preserving targeted broadcast in IoT, and propose two multi-cloud-based outsourced-ABE (attribute-based encryption) schemes. They enable the receivers to partially outsource the computationally expensive decryption operations to the clouds, while preventing attributes from being disclosed

Privacy in location-based services

Während der letzten Jahre erfuhren mobile Geräte durch grössere Speicher, der Entwicklung schnellerer Prozessoren und höherer Übertragungsraten, um nur einige der wichtigsten Performanceparameter zu nennen, einen enormen Entwicklungsschub. Gleichzeitig sind die unterschiedlichen Positionierungssysteme mittlerweile ausgereift und klein genug, um in mobile Geräte verbaut werden zu können. Erst durch die Möglichkeit der Zusammenführung von solchen ausgereiften Positionierungs- mit existierenden Telekommunikationstechnologien kann die Basis für eine neue Generation kontextsensitiver Anwendungen und entsprechender Geschaeftsmodelle geschaffen werden. Abgesehen von den technischen Massnahmen die zum Schutz gegen Attacken, Verfaelschungen und Missbrauch sensitiver Daten eingesetzt werden, müssen diese auch allen rechtlichen Aspekten und Rahmenbedingungen von Telekommunikationssystemen entsprechen. In diesem Sinne muss das Ziel von Forschungen im Bereich neuer kontext-sensitiver Systeme und Anwendungen die mit Positionsdaten operieren der Schutz der Privatheit jedes einzelnen Nutzers sein. Diese Dissertation beginnt mit einer Diskussion über verschiedene Aspekte von Location-Based Systemen. Es werden weiters unterschiedliche Anforderungen aufgezeigt deren Erfüllung notwendig sind, um flexible Systeme anbieten zu können und die zudem den Schutz der Privatheit der Nutzer garantieren können. Der wohl wichtigste Beitrag dazu ist ein Mechanismus der auf dem Begriff des Pseudonyms basiert.Dieses Verfahren garantiert maximale Sicherheit und Schutz der Privatheit der Benutzer während der Nutzung von Diensten. Der zweite Beitrag der Dissertation ist eine Telekom Service Architektur die den erwähnten Pseudonym-basierten Mechanismus integriert. Durch Einbeziehen dedizierter Dienste von Telekommunikationsanbietern bildet diese Architektur die Basis für die Realisierung neuer Geschäftsmodelle und ermöglicht die Implementierung des pay-as-you-go Konzeptes. Dieses ermöglicht Kunden anonym mobile Dienste von Drittanbietern zu konsumieren, ähnlich dem anonymen Kauf von Gütern mit realem Geld. Schliesslich wird mit der Implementierung einer Service Platform sowohl die Funktionsweise des Pseudonym Mechanismus sowie die Interaktionen der in der System Architektur vorgesehenen Dienste und Komponenten die zur Realisierung von Location-Based Anwendungen benötigt werden demonstriert.During the last years the development of mobile devices has gained significant progress with respect to memory capabilities, advanced processing power and higher transfer rates to name only a few performance parameters. At the same time eclectic positioning and localization technologies are meanwhile mature enough to be integrated into mobile devices. Not until positioning, localization and telecommunication technologies can be combined, seamlessly the basis for the proliferation of a new generation of context-aware applications and business models can be build. In this respect, location and position information foster novel future context-awareapplications. But, if this information is in the wrong hands such applications may by the same token pose severe threat. Therefore, apart from technical means against attacks, forgery and misuse of sensitive user information the interaction of all these systems must comply with legal requirements that precisely prescribe all aspects of telecommunication systems. In this spirit, the main research ob jective addressed for the design of new context- aware and location-based systems must be the protection of the user’s privacy. This dissertation discusses first various aspects of location-based systems and out of it the various needs that have to be addressed to be able to provide flexible location-based services to mobile users by preserving privacy. The main contribution of this work is a mechanism that is based on the notion of pseudonyms. The use of this kind of pseudonyms provides maximum security and privacy for users during communication. The second contribution is a telecommunication service architecture that is tightly coupled with the pseudonym mechanism. It allows new business models to be applied by leveraging the use of some services of the telcos’ infrastructure. This service application further allows the implementation of the so called pay-as-you-go concept. This allows customers to anonymously consume mobile services that are offered by third party application providers similarly to buying physical goods with cash. Finally, we demonstrate the implementation of a service platform that allows us to illustrate the operation of the pseudonym mechanism and the interworking of the system architecture’s components that are tailored for the realization of location-based applications

Security in Internet of Things: networked smart objects.

Internet of Things (IoT) is an innovative paradigm approaching both industries and humans every-day life. It refers to the networked interconnection of every-day objects, which are equipped with ubiquitous intelligence. It not only aims at increasing the ubiquity of the Internet, but also at leading towards a highly distributed network of devices communicating with human beings as well as with other devices. Thanks to rapid advances in underlying technologies, IoT is opening valuable opportunities for a large number of novel applications, that promise to improve the quality of humans lives, facilitating the exchange of services. In this scenario, security represents a crucial aspect to be addressed, due to the high level of heterogeneity of the involved devices and to the sensibility of the managed information. Moreover, a system architecture should be established, before the IoT is fully operable in an efficient, scalable and interoperable manner. The main goal of this PhD thesis concerns the design and the implementation of a secure and distributed middleware platform tailored to IoT application domains. The effectiveness of the proposed solution is evaluated by means of a prototype and real case studies