Daniel Wilusz

The Architecture of Coupon-Based, Semi-off-Line, Anonymous Micropayment System for Internet of Things

In the Internet of Things a lot of business opportunities may be identified. The devices in IoT may create ad-hoc temporary networks to provide services or share some resources. Such services are characterized by a great economical potential, especially while provided at mass-scale and for incidental users. However, the development of paid services or resources in IoT is hampered by relatively big transaction costs of payment operations. To deal with this problem, we propose a novel architecture of coupon based, semi off line, anonymous micropayment system to enable transactions in the scope of Internet of Things. User anonymity and security is assured by the usage of standard cryptographic techniques together with novel architectural design of the payment processes. Utilization of a hash function allows generating and verifying electronic coins in computationally efficient way, so as to be executed even in hardware- and software-restricted environment such as Internet of Things.

Building Modular Middlewares for the Internet of Things with OSGi

The paper addresses an analysis of OSGi in the context of building modular middlewares for the Internet of Things. The Internet of Things (IoT) is an emerging approach to development of intelligent infrastructures combining various devices through the network. OSGi is a framework providing a number of specific mechanisms intended for building modular, fine-grained and loosely-coupled Java applications. Although a number of works have been devoted to OSGi, and several OSGi-based middlewares have been designed for the IoT, they do not thoroughly utilize mechanisms of OSGi. In this paper rich OSGi functions are analysed in terms of development middlewares for the IoT. An example implementation of the system illustrates the presented considerations.

Privacy-Preserving Protocol for Smart Space Services with Negotiable Comfort Preferences

In this paper an architecture and a protocol for secure and privacy-preserving service usage in smart spaces are presented. Comfort preferences that are defined and stored on end-users mobile devices are subject to negotiations. The approach relies on a single trusted party operating as a public service in the “security infrastructure as a service” model. It is designed to assure resilience against attacks on users privacy from the side of service providers (SPs), user’s attempts to use the services in an unauthorized manner, user’s attempts to violate payment policies, as well as payment authority’s attacks on privacy of users’ payment patterns. From the SP perspective, the proposed approach minimizes the risk of unauthorized service usage, or denial of service attacks. All players benefit from the fast and secure micropayments allowing for pay-per-use model implementation, which is natural in ubiquitous services usage scenarios.

Application of NXT based robots for teaching java-based concurrency

Education in the field of computer programming is a challenging task, in particular when some complex issues are introduced for non-computer science students. A number of simplified programming languages, environments and simulation software have been developed in recent years to support both teaching as well as self-learning of different programming techniques. However, there are no solutions for teaching in the domain of concurrent programming in the Java language. In this paper we present our original concept of studies using NXT robots to teach Java-based concurrency. An NXT robot equipped with Java virtual machine seems to be a good solution to improve teaching concurrent programming. Actions performed in real-time by robots allow students to observe the performance of their applications and quickly identify mistakes in their code.