Earticle

Impossible differential cryptanalysis (IDC) is a variant of differential cryptanalysis (DC) against block ciphers whereby impossible differential characteristics are used to retrive a subkey material for the first or the last several rounds of block ciphers. Thus the security of a block cipher against IDC can be evaluated by impossible differential characteristics [1]. In this paper, we will first examine the security of Extended Feistel Networks (EFN) against DC and then use the U-method introduced in [1] to find impossible differential characteristics of EFN.

Existing recommender systems generate recommendation usually using user's information previously collected. The information reflects the user`s tastes, but it doesn`t include user`s intend at that time. So existing recommender systems sometimes generate not suitable recommendation because of difference between user`s current purpose and the information of past time. In this paper, we propose genetic recommend generating method for overcome this problem. Our method analyzes user`s real-time click-stream for grabbing user`s current intention, then uses genetic algorithm for generating appropriate recommendation. To reflect user`s real-time intention, the proposed method adapts fitness function of genetic algorithm continuously. To evaluate the proposed approach, we compare the proposed method with existing CF methods using the web-server log data collected from Internet jewelry shop. And we confirm that the proposed approach can generate more accurate recommendation then compared methods.

Many of manufacturing companies faced to globalization make an effort to obtain a competitiveness of speediness, flexibility, collaboration by using the informatization. It has been operated on enabler to drive creation of performance beyond just playing the role of office automation in the enterprise. According to this importance of informatization in enterprise, it also has been studied roundly to analyze its level. So, in this paper we suggest the conceptual methodology to analyze the level of collaboration informatization between manufacturing companies from the viewpoint of performance on the supply chain process. Also we applied it to automobile industry in order to set out the method. It will contribute to a new perspective analyzing the informatization status in the manufacturing industries.

To generate test cases for the unit testing of business process written in BPEL, developers have to prepare input data for the BPEL process under test (PUT) and verification conditions for output data from the PUT. It could be a tedious task due to the complexity of the PUT which describes the web flow of a distributed collaboration of individual service providers executing concurrently. This paper shows how Stream X-machine (SXM) based testing techniques could be applied to automatically generate test cases for BPEL process. The SXM describes a system as a finite set of states, an internal memory and a number of transitions between the states. One of the strengths of using a SXM to specify a system is that, under certain well defined conditions, it is possible to produce a test suite that is guaranteed to determine the correctness of the implementation under test.

In this paper, we study the software reliability measurement method of reliability testing metrics. Software reliability is very important. But, it is very difficult to test for software reliability measurement. So we describes the software reliability metrics for ISO/IEC 9126, and we introduce Gamma-Lomax software reliability model for multiple error debugging. And we calculate the software reliability measure(reliability metrics, parameter estimation etc). We introduce the measurement method of software reliability quality of software product.

Developing web-based applications is a time-consuming task. Because of the diversity and complexity of web applications, it is difficult to develop web applications in an object-oriented manner. In terms of the Model-View-Control framework (MVC), the control layer has two responsibilities, one is to retrieve the data for the view layer, and the other is to control the navigational structure of the view layer. This makes the boundary between the control layer and view layer unclear. To address these issues, we have developed a web application design framework called XFlash for generating reusable web-based components. In the XFlash framework, we have applied the object-oriented hypermedia design methodology to model web application structures, and provide a model-driven approach for the view layer design. By using this approach, it is possible to develop web user-interfaces in a model-driven manner.

Context awareness, the ability to adapt to the needs of each user, is a fundamental property of pervasive computing systems. Context information is created by tracking the actions and collecting real-time user data, such as location or body temperature. As the system collects more information about its users, the quality of its context-aware services increases, and so does a potential threat to the users’ privacy if the context information is compromised. This paper surveys a wide range of existing pervasive computing systems that address this complex problem, and provides a generalized classification of privacy management techniques used by these systems. A comparative analysis of the surveyed systems and their privacy features is also presented.

Web services as fundamental building blocks for next generation distributed systems, play an important role in today enterprise application architectures. The flexibility and openness of the web services computing model can expose corporate data and business processes to security risks. To support critical applications, the existing web service models need to be extended to assure survivability. In this paper we present a multi-layer architecture for intrusion tolerant web services. The specific goal of the architecture is to use single version software fault tolerance concepts in case of malicious failures. We will also present a coloured Petri net model, which is used for the formal analysis of the proposed architecture.

The aim of this study is to explore whether it is a possible conducive way for college students to understand what they need, and to have successful programs in having information search skill (namely information literacy) through library instruction course in the Technical and Vocational Education System (TVES) of Taiwan. Students who take the course are supposed to use library recourses, to take a quiz, download handouts and PowerPoint, and answer a questionnaire from the e-campus 3 systems which offers many different kinds of learning and teaching support besides attending the weekly two-hour periods in class. This course is offered in the Center for General Education at National Formosa University, Taiwan as an elective course for college students. The result is demonstrated for the positive influence on the enhancement in the library use for students and the conclusion should give valuable information for library to revisit their priorities in terms of the relative efforts in library instruction program.

Recently, Knowledge has been considered as very significant resources of company for the competitive advantages in business environment. Specially, between buyers and suppliers knowledge sharing have been studied long times ago at industrial and business field because the relationship of buyers and suppliers are the most important relationship at business process and business models. Early studies and research, Knowledge sharing is emphasized among the supply chain partners for gaining the goal of company by researchers. However, most of firms haven’t use knowledge of partners in the supply chain well. From this reasons, recently researchers are focusing the knowledge compliments are trigger of Knowledge sharing among the partners that is the include buyers and suppliers. Previous studies and researches haven’t distinguished well about the latent knowledge compliments and realized knowledge compliments. Also, Latent knowledge compliment could be come to be realized sharing between partners by knowledge. For this reason realization of latent knowledge should be established by sharing and unification of information and knowledge in the supply chain.