---
_id: '6287'
abstract:
- lang: eng
  text: 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:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: 'Schryen G. <i>Preventing E-Mail Spam: The Conceptualization and the Analysis
    of an Infrastructure Framework</i>.; 2007.'
  apa: 'Schryen, G. (2007). <i>Preventing E-mail Spam: The Conceptualization and the
    Analysis of an Infrastructure Framework</i>.'
  bibtex: '@book{Schryen_2007, title={Preventing E-mail Spam: The Conceptualization
    and the Analysis of an Infrastructure Framework}, author={Schryen, Guido}, year={2007}
    }'
  chicago: 'Schryen, Guido. <i>Preventing E-Mail Spam: The Conceptualization and the
    Analysis of an Infrastructure Framework</i>, 2007.'
  ieee: 'G. Schryen, <i>Preventing E-mail Spam: The Conceptualization and the Analysis
    of an Infrastructure Framework</i>. 2007.'
  mla: 'Schryen, Guido. <i>Preventing E-Mail Spam: The Conceptualization and the Analysis
    of an Infrastructure Framework</i>. 2007.'
  short: 'G. Schryen, Preventing E-Mail Spam: The Conceptualization and the Analysis
    of an Infrastructure Framework, 2007.'
date_created: 2018-12-18T12:50:22Z
date_updated: 2022-01-06T07:03:00Z
ddc:
- '000'
department:
- _id: '277'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:23:40Z
  date_updated: 2018-12-18T13:23:40Z
  file_id: '6322'
  file_name: anti_spam_framework.pdf
  file_size: 456755
  relation: main_file
file_date_updated: 2018-12-18T13:23:40Z
has_accepted_license: '1'
keyword:
- Email
- Infrastructure
- Internet
- Spam
language:
- iso: eng
oa: '1'
status: public
title: 'Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure
  Framework'
type: report
user_id: '61579'
year: '2007'
...
---
_id: '5655'
abstract:
- lang: eng
  text: 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:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: Schryen G. Do anti-spam measures effectively cover the e-mail communication
    network? A formal approach. <i>The Journal of Information Systems Security (AIS
    Special Interest Group in Security)</i>. 2007;3(2):66-90.
  apa: Schryen, G. (2007). Do anti-spam measures effectively cover the e-mail communication
    network? A formal approach. <i>The Journal of Information Systems Security (AIS
    Special Interest Group in Security)</i>, <i>3</i>(2), 66–90.
  bibtex: '@article{Schryen_2007, title={Do anti-spam measures effectively cover the
    e-mail communication network? A formal approach}, volume={3}, number={2}, journal={The
    Journal of Information Systems Security (AIS Special Interest Group in Security)},
    author={Schryen, Guido}, year={2007}, pages={66–90} }'
  chicago: 'Schryen, Guido. “Do Anti-Spam Measures Effectively Cover the e-Mail Communication
    Network? A Formal Approach.” <i>The Journal of Information Systems Security (AIS
    Special Interest Group in Security)</i> 3, no. 2 (2007): 66–90.'
  ieee: G. Schryen, “Do anti-spam measures effectively cover the e-mail communication
    network? A formal approach,” <i>The Journal of Information Systems Security (AIS
    Special Interest Group in Security)</i>, vol. 3, no. 2, pp. 66–90, 2007.
  mla: Schryen, Guido. “Do Anti-Spam Measures Effectively Cover the e-Mail Communication
    Network? A Formal Approach.” <i>The Journal of Information Systems Security (AIS
    Special Interest Group in Security)</i>, vol. 3, no. 2, 2007, pp. 66–90.
  short: G. Schryen, The Journal of Information Systems Security (AIS Special Interest
    Group in Security) 3 (2007) 66–90.
date_created: 2018-11-14T14:51:41Z
date_updated: 2022-01-06T07:02:22Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:25:12Z
  date_updated: 2018-12-18T13:25:12Z
  file_id: '6324'
  file_name: Do anti-spam measures effectively cover the e-mail communication - Journal
    version.pdf
  file_size: 100448
  relation: main_file
file_date_updated: 2018-12-18T13:25:12Z
has_accepted_license: '1'
intvolume: '         3'
issue: '2'
keyword:
- e-mail
- spam
- e-mail infrastructure
- anti-spam measures
- spamming options
language:
- iso: eng
oa: '1'
page: 66-90
publication: The Journal of Information Systems Security (AIS Special Interest Group
  in Security)
status: public
title: Do anti-spam measures effectively cover the e-mail communication network? A
  formal approach
type: journal_article
user_id: '61579'
volume: 3
year: '2007'
...
---
_id: '5658'
abstract:
- lang: eng
  text: '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:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: Schryen G. The Impact that Placing Email Addresses on the Internet has on the
    Receipt of Spam ? An Empirical Analysis. <i>Computers &#38; Security</i>. 2007;2(5):361-372.
  apa: Schryen, G. (2007). The Impact that Placing Email Addresses on the Internet
    has on the Receipt of Spam ? An Empirical Analysis. <i>Computers &#38; Security</i>,
    <i>2</i>(5), 361–372.
  bibtex: '@article{Schryen_2007, title={The Impact that Placing Email Addresses on
    the Internet has on the Receipt of Spam ? An Empirical Analysis}, volume={2},
    number={5}, journal={Computers &#38; Security}, publisher={Elsevier}, author={Schryen,
    Guido}, year={2007}, pages={361–372} }'
  chicago: 'Schryen, Guido. “The Impact That Placing Email Addresses on the Internet
    Has on the Receipt of Spam ? An Empirical Analysis.” <i>Computers &#38; Security</i>
    2, no. 5 (2007): 361–72.'
  ieee: G. Schryen, “The Impact that Placing Email Addresses on the Internet has on
    the Receipt of Spam ? An Empirical Analysis,” <i>Computers &#38; Security</i>,
    vol. 2, no. 5, pp. 361–372, 2007.
  mla: Schryen, Guido. “The Impact That Placing Email Addresses on the Internet Has
    on the Receipt of Spam ? An Empirical Analysis.” <i>Computers &#38; Security</i>,
    vol. 2, no. 5, Elsevier, 2007, pp. 361–72.
  short: G. Schryen, Computers &#38; Security 2 (2007) 361–372.
date_created: 2018-11-14T14:53:12Z
date_updated: 2022-01-06T07:02:22Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:27:01Z
  date_updated: 2018-12-18T13:27:01Z
  file_id: '6326'
  file_name: The Impact that Placing Email Addresses on the Internet has on the Receipt
    of Spam - An Empirical Analysis - Journal version.pdf
  file_size: 3026200
  relation: main_file
file_date_updated: 2018-12-18T13:27:01Z
has_accepted_license: '1'
intvolume: '         2'
issue: '5'
keyword:
- Address-obfuscating techniques
- email
- empirical analysis
- honeypot
- security by design
- security by obscurity
- spam
language:
- iso: eng
oa: '1'
page: 361-372
publication: Computers & Security
publisher: Elsevier
status: public
title: The Impact that Placing Email Addresses on the Internet has on the Receipt
  of Spam ? An Empirical Analysis
type: journal_article
user_id: '61579'
volume: 2
year: '2007'
...
---
_id: '5661'
abstract:
- lang: eng
  text: Spam has become one of the most annoying and costly phenomenon in the Internet.
    Valid e-mail addresses belong to the most valuable resources of spammers, but
    little is known about spammers? behavior when collecting and harvesting addresses
    and spammers? capabilities and interest in carefully directed, consumer-oriented
    marketing have not been explored yet. Gaining insight into spammers? ways to obtain
    and (mis)use e-mail addresses is useful in many ways, e.g. for the assessment
    of the effectiveness of address obscuring techniques and the usability and necessity
    of hiding e-mail addresses on the Internet. This paper presents a spam honeypot
    project in progress addressing these issues by systematically placing e-mail addresses
    in the Internet and analyzing received e-mails. The honeypot?s conceptual framework,
    its implementation, and first empirical results are presented. Finally, an outlook
    on further work and activities is provided.
author:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: 'Schryen G. An e-mail honeypot addressing spammers’ behavior in collecting
    and applying addresses. In: <i>Proceedings of the 6th IEEE Information Assurance
    Workshop</i>. Westpoint; 2005:37-41.'
  apa: Schryen, G. (2005). An e-mail honeypot addressing spammers’ behavior in collecting
    and applying addresses. In <i>Proceedings of the 6th IEEE Information Assurance
    Workshop</i> (pp. 37–41). Westpoint.
  bibtex: '@inproceedings{Schryen_2005, title={An e-mail honeypot addressing spammers’
    behavior in collecting and applying addresses}, booktitle={Proceedings of the
    6th IEEE Information Assurance Workshop}, publisher={Westpoint}, author={Schryen,
    Guido}, year={2005}, pages={37–41} }'
  chicago: Schryen, Guido. “An E-Mail Honeypot Addressing Spammers’ Behavior in Collecting
    and Applying Addresses.” In <i>Proceedings of the 6th IEEE Information Assurance
    Workshop</i>, 37–41. Westpoint, 2005.
  ieee: G. Schryen, “An e-mail honeypot addressing spammers’ behavior in collecting
    and applying addresses,” in <i>Proceedings of the 6th IEEE Information Assurance
    Workshop</i>, 2005, pp. 37–41.
  mla: Schryen, Guido. “An E-Mail Honeypot Addressing Spammers’ Behavior in Collecting
    and Applying Addresses.” <i>Proceedings of the 6th IEEE Information Assurance
    Workshop</i>, Westpoint, 2005, pp. 37–41.
  short: 'G. Schryen, in: Proceedings of the 6th IEEE Information Assurance Workshop,
    Westpoint, 2005, pp. 37–41.'
date_created: 2018-11-14T14:55:48Z
date_updated: 2022-01-06T07:02:24Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:31:41Z
  date_updated: 2018-12-18T13:31:41Z
  file_id: '6331'
  file_name: Schryen - An e-mail honeypot addressing spammers' behavior in collecting
    and applying addresses.pdf
  file_size: 119362
  relation: main_file
file_date_updated: 2018-12-18T13:31:41Z
has_accepted_license: '1'
keyword:
- Spam
- ham
- e-mail
- honeypot
- address obscuring technique
- address taxonomy
language:
- iso: eng
oa: '1'
page: 37-41
publication: Proceedings of the 6th IEEE Information Assurance Workshop
publisher: Westpoint
status: public
title: An e-mail honeypot addressing spammers' behavior in collecting and applying
  addresses
type: conference
user_id: '61579'
year: '2005'
...
---
_id: '5662'
abstract:
- lang: eng
  text: Spam als unerwünschte Massen-E-Mail hat die Grenze von der Belästigung zur
    ökonomischen Relevanz längst überschritten. Ihr relativer Anteil am gesamten,
    weltweiten E-Mail-Aufkommen stieg in den vergangenen Jahren auf mehr als 50% im
    Jahr 2003. Es entstehen jährlich volkswirtschaftliche Schäden in Milliardenhöhe.
    Zur Bekämpfung des Spam-Problems werden neben gesetzlichen Regelungen vor allem
    technische Lösungen eingesetzt, bei denen das Blockieren und Filtern von E-Mails
    in praktisch eingesetzten Anti-Spam-Systemen dominieren. Dieser Artikel führt
    in die Spam-Problematik ein und beschreibt, bewertet und klassifiziert die derzeit
    bedeutendsten Verfahren zur Bekämpfung von Spam.
author:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: Schryen G. Effektivität von Lösungsansätzen zur Bekämpfung von Spam. <i>Wirtschaftsinformatik</i>.
    2004;46(4):281-288.
  apa: Schryen, G. (2004). Effektivität von Lösungsansätzen zur Bekämpfung von Spam.
    <i>Wirtschaftsinformatik</i>, <i>46</i>(4), 281–288.
  bibtex: '@article{Schryen_2004, title={Effektivität von Lösungsansätzen zur Bekämpfung
    von Spam}, volume={46}, number={4}, journal={Wirtschaftsinformatik}, publisher={Springer},
    author={Schryen, Guido}, year={2004}, pages={281–288} }'
  chicago: 'Schryen, Guido. “Effektivität von Lösungsansätzen Zur Bekämpfung von Spam.”
    <i>Wirtschaftsinformatik</i> 46, no. 4 (2004): 281–88.'
  ieee: G. Schryen, “Effektivität von Lösungsansätzen zur Bekämpfung von Spam,” <i>Wirtschaftsinformatik</i>,
    vol. 46, no. 4, pp. 281–288, 2004.
  mla: Schryen, Guido. “Effektivität von Lösungsansätzen Zur Bekämpfung von Spam.”
    <i>Wirtschaftsinformatik</i>, vol. 46, no. 4, Springer, 2004, pp. 281–88.
  short: G. Schryen, Wirtschaftsinformatik 46 (2004) 281–288.
date_created: 2018-11-14T14:56:51Z
date_updated: 2022-01-06T07:02:24Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:36:34Z
  date_updated: 2018-12-18T13:36:34Z
  file_id: '6338'
  file_name: Verlagsversion Guido_Schryen__281__288.pdf
  file_size: 288686
  relation: main_file
file_date_updated: 2018-12-18T13:36:34Z
has_accepted_license: '1'
intvolume: '        46'
issue: '4'
keyword:
- Spam
- E-Mail
- Spoofing
- Blockieren
- Filtern
- Lightweight Mail Transfer Agent Authentication Protocol (LMAP)
language:
- iso: eng
oa: '1'
page: 281-288
publication: Wirtschaftsinformatik
publisher: Springer
status: public
title: Effektivität von Lösungsansätzen zur Bekämpfung von Spam
type: journal_article
user_id: '61579'
volume: 46
year: '2004'
...
---
_id: '5663'
abstract:
- lang: eng
  text: Spam as unsolicited e-mail to a large number of recipients is known to ecome
    an increasingly disturbing and costly issue of electronic business and internet
    traffic. Mainly technical-oriented approaches are applied with a focus on blocking,
    filtering, and authentication mechanisms based on the domain name system. They
    come along with different drawbacks and have all low effectiveness in common.
    The article sketches these approaches, shows its limitations, and proposes an
    account-based approach where the number of e-mails per day and account is restricted.
author:
- first_name: Guido
  full_name: Schryen, Guido
  id: '72850'
  last_name: Schryen
citation:
  ama: 'Schryen G. Fighting Spam: Motivating an Account-based Approach. In: Isaias
    P, ed. <i>Proceedings of the IADIS International Conference WWW/Internet 2004.
    Vol. 2</i>. Madrid: IADIS Press; 2004:937-940.'
  apa: 'Schryen, G. (2004). Fighting Spam: Motivating an Account-based Approach. In
    P. Isaias (Ed.), <i>Proceedings of the IADIS International Conference WWW/Internet
    2004. vol. 2</i> (pp. 937–940). Madrid: IADIS Press.'
  bibtex: '@inproceedings{Schryen_2004, place={Madrid}, title={Fighting Spam: Motivating
    an Account-based Approach}, booktitle={Proceedings of the IADIS International
    Conference WWW/Internet 2004. vol. 2}, publisher={IADIS Press}, author={Schryen,
    Guido}, editor={Isaias, PedroEditor}, year={2004}, pages={937–940} }'
  chicago: 'Schryen, Guido. “Fighting Spam: Motivating an Account-Based Approach.”
    In <i>Proceedings of the IADIS International Conference WWW/Internet 2004. Vol.
    2</i>, edited by Pedro Isaias, 937–40. Madrid: IADIS Press, 2004.'
  ieee: 'G. Schryen, “Fighting Spam: Motivating an Account-based Approach,” in <i>Proceedings
    of the IADIS International Conference WWW/Internet 2004. vol. 2</i>, 2004, pp.
    937–940.'
  mla: 'Schryen, Guido. “Fighting Spam: Motivating an Account-Based Approach.” <i>Proceedings
    of the IADIS International Conference WWW/Internet 2004. Vol. 2</i>, edited by
    Pedro Isaias, IADIS Press, 2004, pp. 937–40.'
  short: 'G. Schryen, in: P. Isaias (Ed.), Proceedings of the IADIS International
    Conference WWW/Internet 2004. Vol. 2, IADIS Press, Madrid, 2004, pp. 937–940.'
date_created: 2018-11-14T14:59:03Z
date_updated: 2022-01-06T07:02:25Z
ddc:
- '000'
department:
- _id: '277'
editor:
- first_name: Pedro
  full_name: Isaias, Pedro
  last_name: Isaias
extern: '1'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hsiemes
  date_created: 2018-12-18T13:33:30Z
  date_updated: 2018-12-18T13:33:30Z
  file_id: '6333'
  file_name: Fighting Spam_Motivating an account-based approach.pdf
  file_size: 46083
  relation: main_file
file_date_updated: 2018-12-18T13:33:30Z
has_accepted_license: '1'
keyword:
- e-mail
- spam
- filtering
- blocking
- LMAP
- SMTP account
language:
- iso: eng
oa: '1'
page: 937-940
place: Madrid
publication: Proceedings of the IADIS International Conference WWW/Internet 2004.
  vol. 2
publisher: IADIS Press
status: public
title: 'Fighting Spam: Motivating an Account-based Approach'
type: conference
user_id: '61579'
year: '2004'
...