Earticle

With advances in processor and wireless communication technologies, sensor networks will be used everywhere in the future life. Home networks are one of the good environments that sensor networks will be deployed. In sensor networks, many sensor devices detect various physical data and send them to the base station. In this paper, we present a sensor routing scheme, EESR (Energy-Efficient Sensor Routing) that provides energy-efficient data delivery from sensors to the base station. The proposed scheme divides the area into sectors and locates a manager node to each sector. The manager node receives collected data from sensor devices in its corresponding sector and then transfers the data to the base station through the shortest path of the 2-dimensional (x, y) coordinates. In this process, we use relative direction based routing in the 2-dimensional (x, y) coordinates in wireless sensor networks. Via simulation, we show that the proposed scheme achieve significant energy savings and outperform idealized transitional schemes (e.g., broadcasting, directed diffusion, clustering) under the investigated scenarios.

Corporate mail services are designed to perform better than public mail services. Fast mail delivery, large size file transfer as an attachments, high level spam and virus protection, commercial advertisement free environment are some of the advantages worth to mention. But these mail services are frequent target of hackers and spammers. Distributed Denial of service attacks are becoming more common and sophisticated. The researchers have proposed various solutions to the DDOS attacks. Can we stop these kinds of attacks with available technology? These days the DDoS attack through spam has increased and disturbed the mail services of various organizations. Spam penetrates through all the filters to establish DDoS attacks, which causes serious problems to users and the data. In this paper we propose a novel approach to defend DDoS attack caused by spam mails. This approach is a combination of fine tuning of source filters, content filters, strictly implementing mail policies, educating user, network monitoring and logical solutions to the ongoing attack. We have conducted several experiments in corporate mail services; the results show that this approach is highly effective to prevent DDoS attack caused by spam. The novel defense mechanism reduced 60% of the incoming spam traffic and repelled many DDoS attacks caused by spam.

A uni-stroke text input strategy for wheel input controls is proposed, such as the wheel controls found on the 5th generation ipod multimedia devices. The popularity of the ipod indicates that the wheel input paradigm is intuitive and usable. The proposed uni-strokes are based on circular motions that follow the contour of the wheel. Spatial mnemonics based on the shape of the alphabetic characters are used to minimize the time and effort learning the uni-strokes. An approximate distance based method is used for robust character recognition of uni-stroke patterns.

In a ubiquitous environment, the hardware resources are limited; thus, an appropriate resource management mechanism is required for guaranteeing its processing activity. However, most operating systems (OSs) lack an access control mechanism for CPU resources to guarantee satisfactory processing and to safeguard the system from malicious attacks that affect the CPU resources, resulting in denial of service (DoS). Access control is not intended for CPU resources, which are important for the execution of a program. As a result, OSs cannot control the usage ratio of CPU resources. In this paper, we propose an access control model for CPU resources based on an execution resource. The proposed model can control the usage ratio of CPU resources appropriately for each user and each program domain. This execution resource can be applied to mitigate DoS attacks. In order to evaluate the effectiveness of the proposed method, we describe the results of a basic performance experiment and a DoS simulation experiment employing the Apache web server. From the results, we show that the proposed method can mitigate DoS attacks and does not have bad effects upon the performance of a target service.

This article introduces a privacy framework for Smart Homes, supporting individuals roaming freely in pervasive computing environments. Such environments typically are equipped with different kinds of sensors and tracking devices for context-aware service provisioning. While on the one hand, people want to take advantage of the comfort and added value of personalized context-aware services, privacy and traceability becomes a serious concern on the other hand. The question arises, how we can build up trust into inherently untrusted services in a potentially hostile environment? How can it be guaranteed that eventually all sensitive data is deleted or safely stored away? The Sentry@HOME concept, as part of our User-centric Privacy Framework, addresses these concerns. It is designed to become an integral part of the user’s home environment; seamlessly embedded into the Smart Home software infrastructure.. The Smart Home itself then can be leveraged to act as a privacy proxy for a tracked individual. On behalf of the user it constitutes the central privacy enforcement point for all privacy-relevant accesses to private or sensitive data. We are confident that our contribution, the combination of Smart Homes and a privacy-aware infrastructure, substantially adds to the success of personalized pervasive computing systems.

Security has been an important issue in the smart home applications. In home networks with distributed architectures that consist of a broad range of wired or wireless devices, it is likely that unauthorized access to some restricted data or devices may occur. Therefore, it becomes important to consider issues of security, authentication and access control. The authentication and authorization of users in smart environments are the key factors in the security of home networks. User authentication has been traditionally based on PIN, password, key, smart card or biometrics. Password-based authentication is widely used to identify legitimate users, because passwords are cheap, easy and reasonably accurate. In conventional password-based authentication methods, passwords store as a password or verification table. These methods use some encryption algorithms to prevent the passwords from being revealed, but they are still vulnerable. In this paper, we train a neural network to store encrypted passwords and use it instead of the password or verification table. This proposed method can solve the security problems in some authentication system and can be used to store the user profiles and access controls in smart home networks.

This paper seeks to define a process that allows for the reconfiguration of management processes, in a manner that is easier than those afforded by existing approaches. This project proposes to achieve this through the use of a Software Distribution Management System (SDMS) that employs a service-oriented mechanism. This constitutes an improvement over more traditional distribution systems because SDMS allows for the reconfiguration of management distribution processes. In addition, this study applies a Service-Oriented Software Engineering (SOSE) development methodology for designing and building of a Service Oriented Architecture (SOA) based on SDMS. While based on a conventional methodology this gives consideration to added dimensions such as service choreography, and service bus. The result is a approach that allows software engineers to readily reconfigure and recombine services from a range of different systems, applications, architectures and ages. This paper provides the service identification results and monitoring methodology of the SDMS produced by this project.

In ubiquitous computing environments like smart home, residents can conveniently enjoy various home entertainments, such as watching TV, listening music, etc, through invisible and virtual interactions between residents and the home accomplished by ubiquitous computing. This paper designs a Ubiquitous Multimedia Information Delivering Service (U-MIDS) for smart home, U-MIDS can automatically deliver multimedia information, such as MP3 music, Internet radios, (Text-to-Speech) spoken online news, and personal spoken messages, to the residents according to their positions and behaviors in a smart home. Basically, the U-MIDS consists of RFID modules, embedded network media players and a U-MIDS gateway. RFID modules are used to identify the identities of home residents and which room they locate. An embedded network media player is a device broadcasting multimedia information to home residents. The U-MIDS gateway can control these network media players to play desirable spoken information, music, etc. Besides, we also integrate semantic concepts and inference rules into the U-MIDS hoping home smarter. That is, the gateway of U-MIDS can automatically provide proper multimedia services for its residents according to residents’ preferences, locations, situations, etc. Through our proposed U-MIDS, the residents can be freely and easily gather the ubiquitous multimedia information upon their locations, preferences, and home intelligence all the time.

The 4th generation mobile communication system certainly will have a lot of improvement such as supporting higher multimedia loading, offering faster transmission rate, and the implementation of IP. The future service of the network will be definitely conveyed into an All-IP network. To allow people to better perform their daily living activities, improve the life quality, and enjoy entertainment and leisure activities, we proposed our system in this paper. This system is built upon a new technology of a 4G network, which includes the user authentication in heterogeneous network, the key generation, and data encryption that later merged together into a cross layer network for smart living space. This technology can develop a smart and convenient way of living.