TY - JOUR AB - 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. AU - Schryen, Guido ID - 5652 IS - 1 JF - Information and Communications Technology Law TI - Anti-spam legislation: An analysis of laws and their effectiveness VL - 16 ER - TY - CHAP AU - Schryen, Guido ED - Satesh, D. ED - Prabhakar, R. ID - 5653 T2 - Spam: An Introduction TI - Approaches Addressing Spam ER - TY - CONF AB - 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. AU - Schryen, Guido ID - 5654 T2 - 40th Annual Hawaii International Conference on System Sciences TI - Armed for the spam battle - a technological and organizational infrastructure framework ER - TY - JOUR AB - 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. AU - Schryen, Guido ID - 5655 IS - 2 JF - The Journal of Information Systems Security (AIS Special Interest Group in Security) KW - e-mail KW - spam KW - e-mail infrastructure KW - anti-spam measures KW - spamming options TI - Do anti-spam measures effectively cover the e-mail communication network? A formal approach VL - 3 ER - TY - CHAP AU - Schryen, Guido ED - Schulte, Heinz ID - 5656 T2 - Vom LAN zum Kommunikationsnetz - Systeme und Applikationen TI - Location Based Services ER - TY - CHAP AU - Schryen, Guido ED - Schulte, Heinz ID - 5657 T2 - Vom LAN zum Kommunikationsnetz - Systeme und Applikationen, Edition 02/2007 TI - Spam-Emails VL - 9/12 ER - TY - JOUR AB - 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. AU - Schryen, Guido ID - 5658 IS - 5 JF - Computers & Security KW - Address-obfuscating techniques KW - email KW - empirical analysis KW - honeypot KW - security by design KW - security by obscurity KW - spam TI - The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis VL - 2 ER - TY - CONF AB - In this paper, we present a framework that supports experimenting with evolutionary hardware design. We describe the framework's modules for composing evolutionary optimizers and for setting up, controlling, and analyzing experiments. Two case studies demonstrate the usefulness of the framework: evolution of hash functions and evolution based on pre-engineered circuits. AU - Kaufmann, Paul AU - Platzner, Marco ID - 6508 KW - integrated circuit design KW - hardware evolution KW - evolutionary hardware design KW - evolutionary optimizers KW - hash functions KW - preengineered circuits KW - Hardware KW - Circuits KW - Design optimization KW - Visualization KW - Genetic programming KW - Genetic mutations KW - Clustering algorithms KW - Biological cells KW - Field programmable gate arrays KW - Routing SN - 076952866X T2 - Second NASA/ESA Conference on Adaptive Hardware and Systems (AHS 2007) TI - MOVES: A Modular Framework for Hardware Evolution ER - TY - JOUR AU - Bendfeld, Jörg AU - Ellinghaus, T. AU - al., et. ID - 6700 JF - Erneuerbare Energien TI - Messen, testen, konstruieren VL - 1 ER - TY - CONF AU - Bendfeld, Jörg AU - Splett, Michael AU - Voss, Jürgen AU - Higgen, Anne AU - Krieger, Jens ID - 6701 T2 - Proceedings of the European Wind Energy Conference & Exhibition (EWEC 2007) TI - Reliable and cost-effective design for an offshore metmast ER -