@inproceedings{3481, author = {{Klose, Karsten and Knackstedt, Ralf and Beverungen, Daniel}}, booktitle = {{Proceedings of the 15th European Conference on Information System}}, location = {{St. Gallen, Switzerland}}, title = {{{Identification of services --- A stakeholder-based approach to SOA development and its application in the area of production planning}}}, year = {{2007}}, } @article{3508, author = {{Becker, Jörg and Winkelmann, Axel and Beverungen, Daniel and Janiesch, Christian}}, journal = {{HMD --- Praxis der Wirtschaftsinformatik}}, number = {{258}}, pages = {{45----56}}, title = {{{Bereitstellung von Artikelstammdaten}}}, year = {{2007}}, } @article{5840, author = {{Kundisch, Dennis and Pfeiler, F. and Schiefele, V.}}, journal = {{Steuer und Wirtschaft}}, number = {{2}}, pages = {{134--144}}, title = {{{Finanzwirtschaftliche Analyse der schenkungsteuerlichen Zehnjahresregel}}}, volume = {{84}}, year = {{2007}}, } @inproceedings{5999, author = {{Kundisch, Dennis and Sackmann, S. and Ruch, M.}}, booktitle = {{INFORMS International Puerto Rico 2007 Meeting}}, location = {{Rio Grande, Puerto Rico}}, title = {{{Customer Portfolio Management in E-Commerce – A Risk Management Perspective}}}, year = {{2007}}, } @inproceedings{6001, author = {{Kundisch, Dennis and Stuber, T.}}, booktitle = {{Wirtschaftsinformatik 2007 - eOrganisation: Service-, Prozess-, Market-Engineering}}, editor = {{Oberweis, A. and Weinhardt, C. and Gimpel, H. and Koschmider, A. and Pankratius, V. and Schnizler, B.}}, location = {{Karlsruhe, Germany}}, pages = {{651--668}}, publisher = {{Universitätsverlag}}, title = {{{Außerbörslicher Emittentenhandel: Handelsplatzwahl von Online-Investoren}}}, year = {{2007}}, } @inproceedings{6002, author = {{Kundisch, Dennis and Loehner, F. and Rudolph, D. and Steudner, M. and Weiss, C.}}, booktitle = {{2007 Enterprise Risk Management Symposium Monograph}}, location = {{Chicago, Illinois, USA}}, title = {{{Bank controlling using Basel II-data: Are internal approaches dispensable?}}}, year = {{2007}}, } @inproceedings{6003, author = {{Buhl, H. U. and Kundisch, Dennis and Schackmann, N. and Renz, A.}}, booktitle = {{Wirtschaftsinformatik 2007 - eOrganisation: Service-, Prozess-, Market-Engineering}}, location = {{Karlsruhe}}, pages = {{879--912}}, publisher = {{Universitätsverlag}}, title = {{{Spezifizierung des Kano-Modells zur Messung von Kundenzufriedenheit}}}, year = {{2007}}, } @techreport{6287, abstract = {{Spamming remains a form of Internet abuse, which burdens the Internet infrastructure, is generally regarded as an annoyance, and is said to cause a huge economic harm. Many technological, organizational, and legislative anti-spam measures have already been proposed and implemented, but have not led to any substantial decrease in the number of spam e-mails. We propose a scalable and flexible infrastructure framework that integrates several anti-spam measures and that features both a technological and an organizational facet. The key element of our infrastructure is a new organizational unit that reliably and transparently limits the number of e-mails that can be sent per day and per account. We also analyze the proposed framework in terms of its theoretical effectiveness, the required resources, and its limitations.}}, author = {{Schryen, Guido}}, keywords = {{Email, Infrastructure, Internet, Spam}}, title = {{{Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework}}}, year = {{2007}}, } @inbook{5650, author = {{Schryen, Guido}}, booktitle = {{Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research}}, editor = {{Satesh, D. and Prabhakar, R.}}, pages = {{55--64}}, publisher = {{ICFAI University Press}}, title = {{{A Scalable and Flexible Infrastructure Framework For Addressing Spam}}}, year = {{2007}}, } @book{5651, author = {{Schryen, Guido}}, publisher = {{Springer}}, title = {{{Anti-Spam Measures: Analysis and Design}}}, year = {{2007}}, } @article{5652, abstract = {{More than half of world-wide e-mail traffic ? an estimated total of several billion e-mails per day ? consists of spam. This is becoming a considerable disturbance to telecommunications. Spam is also closely related to other kinds of cyber crime as it possibly contains malicious software or is pursuing some kind of fraudulent aim, such as phishing. Besides technical and organizational measures, many countries have introduced anti-spam legislation. However, today's world-wide legislative coverage of spam is heterogeneous, and its effectiveness is controversially discussed. This article describes important parameters by which anti-spam legislation can vary and gives an overview and analysis of world-wide anti-spam legislation, including the European Directive 2002/58/EC, the U.S. CANSPAM Act of 2003, and international cooperation, such as the London Action Plan. The article then proceeds to discuss the effectiveness of current laws, and it identifies problems resulting from the fact that an international phenomenon is being addressed by national legislation. Finally, the article presents suggestions for overcoming some of these problems.}}, author = {{Schryen, Guido}}, journal = {{Information and Communications Technology Law}}, number = {{1}}, pages = {{17--32}}, publisher = {{Taylor \& Francis}}, title = {{{Anti-spam legislation: An analysis of laws and their effectiveness}}}, volume = {{16}}, year = {{2007}}, } @inbook{5653, author = {{Schryen, Guido}}, booktitle = {{Spam: An Introduction}}, editor = {{Satesh, D. and Prabhakar, R.}}, pages = {{41--57}}, publisher = {{ICFAI University Press}}, title = {{{Approaches Addressing Spam}}}, year = {{2007}}, } @inproceedings{5654, abstract = {{Spamming remains a form of Internet abuse, which burdens the Internet infrastructure, is generally regarded as an annoyance, and is said to cause economic harm to the tune of about several billion US\$ per year. Many technological, organizational, and legislative anti-spam measures have already been proposed and implemented, but have not led to any substantial decrease in the number of spam e-mails. We propose here a new infrastructure framework that combines several anti-spam measures in a framework that features both a technological and an organizational facet. The key element of our infrastructure is a new organizational unit that reliably and transparently limits he number of e-mails that can be sent per day and per account. This paper first gives an overview of the framework, then it provides technological and organizational details of the infrastructure, the deployment of which depends to a large degree on its acceptance and propagation by the ICANN, the ISOC, and by large e-mail service providers. Finally, the paper discusses the limitations and drawbacks of the proposed framework.}}, author = {{Schryen, Guido}}, booktitle = {{40th Annual Hawaii International Conference on System Sciences}}, title = {{{Armed for the spam battle - a technological and organizational infrastructure framework}}}, year = {{2007}}, } @article{5655, abstract = {{Spam e-mails have become a serious technological and economic problem. Up to now, by deploying complementary anti-spam measures, we have been reasonably able to withstand spam e-mails and use the Internet for regular communication. However, if we are to avert the danger of losing the Internet e-mail service in its capacity as a valuable, free and worldwide medium of open communication, anti-spam activities should be performed more systematically than is currently the case regarding the mainly heuristic, anti-spam measures in place. A formal framework, within which the existing delivery routes that a spam e-mail may take, and anti-spam measures and their effectiveness can be investigated, will perhaps encourage a shift in methodology and pave the way for new, holistic anti-spam measures. This paper presents a model of the Internet e-mail infrastructure as a directed graph and a deterministic finite automaton and draws on automata theory to formally derive the spam delivery routes. The most important anti-spam measures are then described. Methods controlling only specific delivery routes are evaluated in terms of how effectively they cover the modeled e-mail infrastructure; methods operating independently of any particular routes receive a more general assessment.}}, author = {{Schryen, Guido}}, journal = {{The Journal of Information Systems Security (AIS Special Interest Group in Security)}}, keywords = {{e-mail, spam, e-mail infrastructure, anti-spam measures, spamming options}}, number = {{2}}, pages = {{66--90}}, title = {{{Do anti-spam measures effectively cover the e-mail communication network? A formal approach}}}, volume = {{3}}, year = {{2007}}, } @inbook{5656, author = {{Schryen, Guido}}, booktitle = {{Vom LAN zum Kommunikationsnetz - Systeme und Applikationen}}, editor = {{Schulte, Heinz}}, publisher = {{Interest-Verlag}}, title = {{{Location Based Services}}}, year = {{2007}}, } @inbook{5657, author = {{Schryen, Guido}}, booktitle = {{Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007}}, editor = {{Schulte, Heinz}}, publisher = {{Interest-Verlag}}, title = {{{Spam-Emails}}}, volume = {{9/12}}, year = {{2007}}, } @article{5658, abstract = {{Email communication is encumbered with a mass of email messages which their recipients have neither requested nor require. Even worse, the impacts of these messages are far from being simply an annoyance, as they also involve economic damage. This manuscript examines the resource ?email addresses?, which is vital for any potential bulk mailer and spammer. Both a methodology and a honeypot conceptualization for implementing an empirical analysis of the usage of email addresses placed on the Internet are proposed here. Their objective is to assess, on a quantitative basis, the extent of the current harassment and its development over time. This ?framework? is intended to be extensible to measuring the effectiveness of address-obscuring techniques. The implementation of a pilot honeypot is described, which led to key findings, some of them being: (1) Web placements attract more than two-thirds (70\%) of all honeypot spam emails, followed by newsgroup placements (28.6\%) and newsletter subscriptions (1.4\%), (2) the proportions of spam relating to the email addresses? top-level domain can be statistically assumed to be uniformly distributed, (3) More than 43\% of addresses on the web have been abused, whereas about 27\% was the case for addresses on newsgroups and only about 4\% was the case for addresses used for a newsletter subscription, (4) Regarding the development of email addresses? attractiveness for spammers over time, the service ?web sites? features a negative linear relationship, whereas the service ?Usenet? hows a negative exponential relationship. (5) Only 1.54\% of the spam emails showed an interrelation between the topic of the spam email and that of the location where the recipient?s address was placed, so that spammers are assumed to send their emails in a ?context insensitive? manner. The results of the empirical analysis motivate the need for the protection of email addresses through obscuration. We analyze this need by formulating requirements for address obscuring techniques and we reveal to which extent today?s most relevant approaches fulfill these requirements.}}, author = {{Schryen, Guido}}, journal = {{Computers & Security}}, keywords = {{Address-obfuscating techniques, email, empirical analysis, honeypot, security by design, security by obscurity, spam}}, number = {{5}}, pages = {{361--372}}, publisher = {{Elsevier}}, title = {{{The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis}}}, volume = {{2}}, year = {{2007}}, } @book{13202, editor = {{Krallmann, Hermann and Schönherr, Marten and Trier, Matthias}}, isbn = {{978-3486584462}}, title = {{{Systemanalyse im Unternehmen - Prozessorientierte Methoden der Wirtschaftsinformatik}}}, year = {{2007}}, } @book{13314, author = {{Trier, Matthias}}, isbn = {{3836415402, 9783836415408}}, publisher = {{VDM Verlag}}, title = {{{Virtual Knowledge Communities - IT-supported Visualization and Analysis}}}, year = {{2007}}, } @inbook{13315, author = {{Aier, Stephan and Haarlaender, Nico}}, booktitle = {{Systemanalyse im Unternehmen : Prozessorientierte Methoden der Wirtschaftsinformatik}}, editor = {{Krallmann, Hermann and Schoenherr, Marten and Trier, Matthias}}, pages = {{229--248}}, publisher = {{Oldenbourg}}, title = {{{Systemanalyse zur Verbesserung von Geschäftsprozessen}}}, volume = {{5., vollst. überarb. Aufl.}}, year = {{2007}}, }