With the rise of global networks like the Internet the importance of workflow systems is growing. However, security questions in such environments often only address secure communication. Another important topic that is often ignored is the separation of duties which is an important part of a company's security policy to prevent fraud. This paper introduces a prototype that supports the graphical modeling and analysis of separation of duties in workflow environments. Security officers can use this tool to design and analyze the security rules associated with workflow specifications.
Immer mehr Unternehmen offerieren ihren Kunden die Möglichkeit, sich mit einem Produktkonfigurator ein individuelles Produkt zu erstellen. Gründe für den Einsatz sind die Realisierung von Alleinstellungsmerkmalen und die Weitergabe der Vorteile von sich immer mehr verbessernden Produktionsprozessen. Ein erfolgreicher Produktkonfigurator sollte eine Reihe von Anforderungen erfüllen, die in diesem Artikel vorgestellt werden. Einführung Henry Ford ist bekannt für seinen Anfang des 20. Jahrhunderts gemachten Ausspruch: ,,Jeder Kunde kann sein Auto in jeder gewünschten Farbe bekommen, solange diese Farbe schwarz ist". Diese Aussage wirkt heute befremdlich, weil der Kunde mittlerweile zwischen einer Vielzahl verschiedener Farben auswählen kann. Generell werden Produkte in unterschiedlichen Varianten gefertigt, beispielsweise verschiedenen Farben und Größen. Die Anzahl der unterschiedlichen Varianten hat sich durch flexible Produktionsprozesse in den letzten Jahren immer weiter erhöht, weshalb er das Produkt immer besser seinen individuellen Wünschen anpassen kann. Zur Erstellung seiner persönlichen Variante kann ein Kunde einen Produktkonfigurator einsetzen. Ein Administrator muss zunächst die möglichen Optionen mit den zugehörigen Optionswerten eines Produkts bestimmen, also beispielsweise die Option ,,Farbe" mit den Optionswerten ,,schwarz" und ,,rot". Weiterhin kann er über Regeln definieren, dass bestimmte Kombinationen von Optionswerten nicht zulässig sind. Hat der Administrator einen Produktkonfigurator eingerichtet, können Kunden
With the rise of mobile devices like cellphones and Personal Digital Assistants (PDAs) in the last years, the demand for specialized mobile solutions grows. Newly defined protocols like WAP or i-Mode can be used to adapt Internet appearances to mobile devices. However, it is often an elaborate work to achieve these adaptions as almost all pages have to be rewritten. This paper shows an approach of semi automatical page generation for mobile devices. It is assumed that a general HTML page is allready existing. Based on this page, an approach of generating personalized mobile device compatible pages is shown. This approach is illustrated using the software eSarine. eSarine is an e-shop softare that can be used to set up an electronic shop.
With the rise of mobile devices like cell phones and personal digital assistants (PDAs) in the last years, the demand for specialized mobile solutions grows. One key application for mobile devices is the Web service. Currently, almost all Web sites are designed for stationary computers and cannot be shown directly on mobile devices because of their limitations. These include a smaller display size, delicate data input facilities and smaller bandwidth compared to stationary devices. To overcome the problems and enable Web sites also for mobile devices, a number of different approaches exist. This paper compares different ways to adapt existing web sites for mobile devices. The following three methods are generally used today: Rewrite the page, use an automatic generator to create the page, or try to use the same page for stationary and mobile devices. This paper illustrates each method by adapting two pages of the electronic shop software eSarine. Afterwards, the methods are compared using different parameters like the complexity of the approach or the ease of integration in existing systems.
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