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171 Publications


2016 | Journal Article | LibreCat-ID: 5617 | OA
Development of two novel face-recognition CAPTCHAs: a security and usability study
G. Schryen, G. Wagner, A. Schlegel, Computers & Security 60 (2016) 95–116.
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2015 | Conference Paper | LibreCat-ID: 5678 | OA
High-Performance Computing for Scheduling Decision Support: A Parallel Depth-First Search Heuristic
G. Rauchecker, G. Schryen, in: Australasian Conference on Information Systems, 2015, pp. 1–13.
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2015 | Journal Article | LibreCat-ID: 5679 | OA
Revenue Management for Cloud Computing Providers: Decision Models for Service Admission Control under Non-probabilistic Uncertainty
T. Püschel, G. Schryen, D. Hristova, D. Neumann, European Journal of Operational Research 244 (2015) 637–647.
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2015 | Conference Paper | LibreCat-ID: 5541 | OA
Requirements for IT Security Metrics - An Argumentation Theory Based Approach
E. Yasasin, G. Schryen, in: 23rd European Conference on Information Systems (ECIS 2015), 2015.
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2015 | Conference Paper | LibreCat-ID: 5588 | OA
A Multi-Theoretical Literature Review on Information Security Investments using the Resource-Based View and the Organizational Learning Theory
E. Weishäupl, E. Yasasin, G. Schryen, in: International Conference on Information Systems, 2015.
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2015 | Conference Paper | LibreCat-ID: 5589 | OA
IT Security Investments Through the Lens of the Resource-Based View: A new Theoretical Model and Literature Review
E. Weishäupl, E. Yasasin, G. Schryen, in: 23rd European Conference on Information Systems (ECIS 2015), 2015.
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2015 | Conference Paper | LibreCat-ID: 5590 | OA
Towards an Economic Approach to Identity and Access Management Systems Using Decision Theory
E. Weishäupl, M. Kunz, E. Yasasin, G. Wagner, J. Prester, G. Schryen, G. Pernul, in: 2nd International Workshop on Security in Highly Connected IT Systems (SHCIS?15), 2015.
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2015 | Journal Article | LibreCat-ID: 5616 | OA
IT-Sicherheit: Ökonomisch Planen und Bewerten
G. Schryen, E. Weishäupl, Managementkompass (2015) 17–18.
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2015 | Conference Paper | LibreCat-ID: 5618 | OA
Theory of Knowledge for Literature Reviews: An Epistemological Model, Taxonomy and Empirical Analysis of IS Literature
G. Schryen, G. Wagner, A. Benlian, in: International Conference on Information Systems (ICIS), 2015.
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2015 | Journal Article | LibreCat-ID: 5622 | OA
Resource Planning in Disaster Response - Decision Support Models and Methodologies
G. Schryen, G. Rauchecker, M. Comes, Business & Information Systems Engineering (BISE) 57 (2015) 243–259.
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2015 | Journal Article | LibreCat-ID: 5634 | OA
Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research
G. Schryen, Communications of the AIS 37 (2015) 286–325.
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2014 | Conference Paper | LibreCat-ID: 5672 | OA
A Decision Support System for IT Security Incident Management
G. Rauchecker, E. Yasasin, G. Schryen, in: 11th International Conference on Trust, Privacy, and Security in Digital Business (TRUSTBUS), 2014.
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2014 | Journal Article | LibreCat-ID: 5686 | OA
Model-based Decision Support in Manufacturing and Service Networks
A. Fink, N. Kliewer, D. Mattfeld, L. Mönch, F. Rothlauf, G. Schryen, L. Suhl, S. Voß, Business & Information Systems Engineering (BISE) 6 (2014) 17–24.
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2014 | Journal Article | LibreCat-ID: 5687 | OA
Modellbasierte Entscheidungsunterstützung in Produktions- und Service-Netzwerken
A. Fink, N. Kliewer, D. Mattfeld, L. Mönch, F. Rothlauf, G. Schryen, L. Suhl, S. Voß, Wirtschaftsinformatik 56 (2014) 21–29.
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2014 | Report | LibreCat-ID: 6197 | OA
The Epistemological Impact of Literature Reviews in Information Systems Research
G. Schryen, The Epistemological Impact of Literature Reviews in Information Systems Research, 2014.
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2014 | Conference Paper | LibreCat-ID: 5573 | OA
A Fuzzy Security Investment Decision Support Model for Highly Distributed Systems
E. Yasasin, G. Rauchecker, J. Prester, G. Schryen, in: 1st Workshop on Security in Highly Connected IT Systems (SHCIS 14), 2014.
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2014 | Journal Article | LibreCat-ID: 5585 | OA
Emergency Response in Natural Disaster Management: Allocation and Scheduling of Rescue Units
F. Wex, G. Schryen, S. Feuerriegel, D. Neumann, European Journal of Operational Research (2014).
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2014 | Journal Article | LibreCat-ID: 5614 | OA
Risk Reduction in Natural Disaster Management Through Information Systems: A Literature review and an IS design science research agenda
G. Schryen, F. Wex, International Journal of Information Systems for Crisis Response and Management (IJISCRAM) 6 (2014).
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2014 | Journal Article | LibreCat-ID: 5627 | OA
Duality in fuzzy linear programming: A survey
G. Schryen, D. Hristova, OR -Spectrum 37 (2014) 1–48.
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2014 | Journal Article | LibreCat-ID: 5636 | OA
Writing qualitative IS literature reviews ? Guidelines for synthesis, interpretation and guidance of research
G. Schryen, Communications of the AIS (2014).
LibreCat | Files available
 

2013 | Journal Article | LibreCat-ID: 5682 | OA
Sicherheitsherausforderungen in hochverteilten Systemen
H. de Meer, M. Diener, R. Herkenhöner, M. Kucera, M. Niedermeier, A. Reisser, G. Schryen, M. Vetter, T. Waas, E. Yasasin, PIK - Praxis Der Informationsverarbeitung Und Kommunikation 36 (2013) 153–159.
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2013 | Journal Article | LibreCat-ID: 6166 | OA
Effektiver Einsatz von Rettungskräften bei Naturkatastrophen - Modelle und Verfahren zur Entscheidungsunterstützung
F. Wex, G. Schryen, Blick in Die Wissenschaft (2013) 27–32.
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2013 | Journal Article | LibreCat-ID: 5575 | OA
Assignments of Collaborative Rescue Units during Emergency Response
F. Wex, G. Schryen, D. Neumann, International Journal of Information Systems for Crisis Response and Management 5 (2013) 63–80.
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2013 | Conference Paper | LibreCat-ID: 5576 | OA
Decision Modeling for Assignments of Collaborative Rescue Units during Emergency Response
F. Wex, G. Schryen, D. Neumann, in: Proceedings of the 46th Hawaii International Conference on System Science, 2013.
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2013 | Journal Article | LibreCat-ID: 5637 | OA
Revisiting IS Business Value Research: What we already know, what we still need to know, and how we can get there
G. Schryen, European Journal of Information Systems (EJIS) 22 (2013) 139–169.
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2012 | Conference Paper | LibreCat-ID: 5680 | OA
Cloud Service Revenue Management
T. Püschel, G. Schryen, D. Hristova, D. Neumann, in: European Conference on Information Systems, 2012.
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2012 | Conference Paper | LibreCat-ID: 5683
Elicitating, modeling, and processing uncertain human preferences for software agents in electronic negotiations: An empirical study
F. Lang, G. Schryen, A. Fink, in: International Conference on Information Systems, 2012.
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2012 | Journal Article | LibreCat-ID: 5688 | OA
Energy-Aware Workload Management Models for Operating Cost Reduction in Data Centers
C. Bodenstein, G. Schryen, D. Neumann, European Journal of Operational Research : EJOR 222 (2012) 157–167.
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2012 | Journal Article | LibreCat-ID: 5578 | OA
A Fuzzy Decision Support Model for Natural Disaster Response under Informational Uncertainty
F. Wex, G. Schryen, D. Neumann, International Journal of Information Systems for Crisis Response and Management 4 (2012) 23–41.
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2012 | Conference Paper | LibreCat-ID: 5579 | OA
Operational Emergency Response under Informational Uncertainty: A Fuzzy Optimization Model for Scheduling and Allocating Rescue Units
F. Wex, G. Schryen, D. Neumann, in: International Conference on Information Systems for Crisis Response and Management (ISCRAM) 2012, 2012.
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2012 | Conference Paper | LibreCat-ID: 5615 | OA
IS Design Thinking in Disaster Management Research
G. Schryen, F. Wex, in: 45th Hawaii International Conference on System Sciences, 2012.
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2012 | Journal Article | LibreCat-ID: 5638 | OA
Profis im Netz: Soziale Netzwerke könnten in Unternehmen viel mehr Nutzen stiften - woran hakt es?, in: Die Zeit (12.04.2012)
G. Schryen, Die Zeit (2012).
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2012 | Journal Article | LibreCat-ID: 5639 | OA
Soziale Netzwerke in Unternehmenskontexten - Potentiale und Anforderungen, in: Information Management & Consulting, to appear
G. Schryen, IM Information Management & Consulting (2012).
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2011 | Conference Paper | LibreCat-ID: 5684 | OA
Automated Negotiations Under Uncertain Preferences
F. Lang, G. Schryen, A. Fink, in: Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), 2011.
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2011 | Conference Paper | LibreCat-ID: 5689 | OA
Reducing Datacenter Energy Usage through Efficient Job Allocation
C. Bodenstein, G. Schryen, D. Neumann, in: Proceedings of the 19th European Conference on Information Systems (ECIS 2011), 2011.
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2011 | Conference Paper | LibreCat-ID: 5581 | OA
Intelligent Decision Support for Centralized Coordination during Emergency Response
F. Wex, G. Schryen, D. Neumann, in: Proceedings of the 8th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2011), 2011.
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2011 | Conference Paper | LibreCat-ID: 5619 | OA
A formal approach towards measuring trust in distributed systems
G. Schryen, M. Volkamer, S. Ries, in: Proceedings of the 26th Annual ACM Symposium on Applied Computing, 2011.
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2011 | Journal Article | LibreCat-ID: 5640 | OA
Is open source security a myth? What do vulnerability and patch data say?
G. Schryen, Communications of the ACM (CACM) Vol. 54 (2011) 130–139.
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2011 | Conference Paper | LibreCat-ID: 5641 | OA
Seeking the VALUE in IS Business Value Research - An Agenda for investigating Synergies Between Socio-organizational Change, IS Capabilities Change, and IS Innovation
G. Schryen, in: IS Capabilities Change, and IS Innovation, Proceedings of the 19th European Conference on Information Systems (ECIS 2011), Helsinki, 2011.
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2010 | Conference Paper | LibreCat-ID: 5685 | OA
Applying heuristic methods for job scheduling in storage markets
J. Finkbeiner, C. Bodenstein, G. Schryen, D. Neumann, in: 18th European Conference on Information Systems (ECIS 2010), 2010.
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2010 | Conference Paper | LibreCat-ID: 5690 | OA
From "Take-it-or-leave-it" offers to "Take-it-or-be-left-out" Ultimatum - A trade mechanism for Online Services
C. Bodenstein, G. Schryen, D. Neumann, in: 18th European Conference on Information Systems (ECIS 2010), 2010.
LibreCat | Files available
 

2010 | Conference Paper | LibreCat-ID: 5598 | OA
Measuring eTrust in distributed systems - General Concept and Application to Internet Voting
M. Volkamer, G. Schryen, in: Proceedings of the 23rd Bled EConference, 2010.
LibreCat | Files available
 

2010 | Conference Paper | LibreCat-ID: 5631 | OA
Increasing software security through open source or closed source development? Empirics suggest that we have asked the wrong question
G. Schryen, R. Eliot, in: 43rd Annual Hawaii International Conference on System Sciences, 2010.
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2010 | Conference Paper | LibreCat-ID: 5632 | OA
A decision-theoretic foundation of IS business value research
G. Schryen, C. Bodenstein, in: Proceedings of the 18th European Conference on Information Systems (ECIS 2010), 2010.
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2010 | Conference Paper | LibreCat-ID: 5642 | OA
A Fuzzy Model for IT Security Investments
G. Schryen, in: F. C. Freiling (Ed.), Sicherheit 2010 : Sicherheit, Schutz Und Zuverl{\"a}ssigkeit ; Konferenzband Der 5. Jahrestagung Des Fachbereichs Sicherheit Der Gesellschaft F{\"u}r Informatik e.V. (GI), 5. - 7. Oktober 2010 in Berlin, Gesellschaft für Informatik, Bonn, 2010, pp. 289–304.
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2010 | Conference Paper | LibreCat-ID: 5643 | OA
An Analysis of Literature Reviews on IS Business Value: How Deficiencies in Methodology and Theory Use Resulted in Limited Effectiveness
G. Schryen, in: Proceedings of the First Scandinavian Conference on Information Systems (SCIS), 2010.
LibreCat | Files available
 

2010 | Journal Article | LibreCat-ID: 5644 | OA
Preserving knowledge on IS business value: what literature reviews have done
G. Schryen, Business \& Information Systems Engineering (BISE) 52 (2010) 225–237.
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2010 | Journal Article | LibreCat-ID: 5645 | OA
Ökonomischer Wert von Informationssystemen - Beitrag von Literatur-Reviews zum Wissenserhalt ( = Preserving Knowledge on IS Business Value. What Literature Reviews Have Done)
G. Schryen, Wirtschaftsinformatik 52 (2010) 225–237.
LibreCat | Files available
 

2009 | Conference Paper | LibreCat-ID: 5597 | OA
Elektronische Wahlen: Verifizierung vs. Zertifizierung
M. Volkamer, G. Schryen, L. Langer, A. Schmidt, J. Buchmann, in: Workshop Elektronische Wahlen, Elektronische Teilhabe, Societyware, 39th GI-Jahrestagung, 2009.
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2009 | Journal Article | LibreCat-ID: 5621 | OA
Security in Large-Scale Internet Elections: A Retrospective Analysis of Elections in Estonia, The Netherlands, and Switzerland
G. Schryen, E. Rich, IEEE Transactions on Information Forensics \& Security 4 (2009) 729–744.
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2009 | Conference Paper | LibreCat-ID: 5625 | OA
Open Source vs. Closed Source Software: Towards Measuring Security
G. Schryen, R. Kadura, in: 24th Annual ACM Symposium on Applied Computing, 2009.
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2009 | Conference Paper | LibreCat-ID: 5646 | OA
A comprehensive and comparative analysis of the patching behavior of open source and closed source software vendors
G. Schryen, in: 5th International Conference on IT Security Incident Management \& IT Forensics, 2009.
LibreCat | Files available
 

2009 | Conference Paper | LibreCat-ID: 5647 | OA
Security of open source and closed source software: An empirical comparison of published vulnerabilities
G. Schryen, in: 15th Americas Conference on Information Systems, 2009.
LibreCat | Files available
 

2008 | Journal Article | LibreCat-ID: 5648 | OA
Effektivität und Effizienz von Anti-Spam-Maßnahmen
G. Schryen, Linux Technical Review (2008).
LibreCat | Files available
 

2008 | Conference Paper | LibreCat-ID: 5649 | OA
Practical Security of Large-scale Elections: An Exploratory Case Study of Internet Voting in Estonia
G. Schryen, in: 7th Workshop on E-Business (WEB 2008, AIS Special Interest Group on E-Business), 2008.
LibreCat | Files available
 

2007 | Report | LibreCat-ID: 6287 | OA
Preventing E-mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework
G. Schryen, Preventing E-Mail Spam: The Conceptualization and the Analysis of an Infrastructure Framework, 2007.
LibreCat | Files available
 

2007 | Book Chapter | LibreCat-ID: 5650
A Scalable and Flexible Infrastructure Framework For Addressing Spam
G. Schryen, in: D. Satesh, R. Prabhakar (Eds.), Proceedings of IPSI International Conference on Advances in the Internet, Processing, Systems, and Interdisciplinary Research, ICFAI University Press, Hyderabad, India, 2007, pp. 55–64.
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2007 | Book | LibreCat-ID: 5651
Anti-Spam Measures: Analysis and Design
G. Schryen, Anti-Spam Measures: Analysis and Design, Springer, Berlin, Heidelberg, New York, 2007.
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2007 | Journal Article | LibreCat-ID: 5652 | OA
Anti-spam legislation: An analysis of laws and their effectiveness
G. Schryen, Information and Communications Technology Law 16 (2007) 17–32.
LibreCat | Files available
 

2007 | Book Chapter | LibreCat-ID: 5653
Approaches Addressing Spam
G. Schryen, in: D. Satesh, R. Prabhakar (Eds.), Spam: An Introduction, ICFAI University Press, Hyderabad, India, 2007, pp. 41–57.
LibreCat
 

2007 | Conference Paper | LibreCat-ID: 5654 | OA
Armed for the spam battle - a technological and organizational infrastructure framework
G. Schryen, in: 40th Annual Hawaii International Conference on System Sciences, 2007.
LibreCat | Files available
 

2007 | Journal Article | LibreCat-ID: 5655 | OA
Do anti-spam measures effectively cover the e-mail communication network? A formal approach
G. Schryen, The Journal of Information Systems Security (AIS Special Interest Group in Security) 3 (2007) 66–90.
LibreCat | Files available
 

2007 | Book Chapter | LibreCat-ID: 5656
Location Based Services
G. Schryen, in: H. Schulte (Ed.), Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Interest-Verlag, Kissing, 2007.
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2007 | Book Chapter | LibreCat-ID: 5657
Spam-Emails
G. Schryen, in: H. Schulte (Ed.), Vom LAN Zum Kommunikationsnetz - Systeme Und Applikationen, Edition 02/2007, Interest-Verlag, Kissing, 2007.
LibreCat
 

2007 | Journal Article | LibreCat-ID: 5658 | OA
The Impact that Placing Email Addresses on the Internet has on the Receipt of Spam ? An Empirical Analysis
G. Schryen, Computers & Security 2 (2007) 361–372.
LibreCat | Files available
 

2006 | Conference Paper | LibreCat-ID: 5659 | OA
A formal approach towards assessing the effectiveness of anti-spam procedures
G. Schryen, in: 39th Annual Hawaii International Conference on System Sciences, 2006.
LibreCat | Files available
 

2005 | Journal Article | LibreCat-ID: 5660 | OA
A honeypot for the exploration of spammers' behaviour
G. Schryen, IATAC IAnewsletter 8 (2005) 22–25.
LibreCat | Files available
 

2005 | Conference Paper | LibreCat-ID: 5661 | OA
An e-mail honeypot addressing spammers' behavior in collecting and applying addresses
G. Schryen, in: Proceedings of the 6th IEEE Information Assurance Workshop, Westpoint, 2005, pp. 37–41.
LibreCat | Files available
 

2004 | Conference Paper | LibreCat-ID: 5765 | OA
Security Aspects of Internet Voting
G. Schryen, in: 37th Annual Hawaii International Conference on System Sciences, 2004.
LibreCat | Files available
 

2004 | Journal Article | LibreCat-ID: 5662 | OA
Effektivität von Lösungsansätzen zur Bekämpfung von Spam
G. Schryen, Wirtschaftsinformatik 46 (2004) 281–288.
LibreCat | Files available
 

2004 | Conference Paper | LibreCat-ID: 5663 | OA
Fighting Spam: Motivating an Account-based Approach
G. Schryen, in: P. Isaias (Ed.), Proceedings of the IADIS International Conference WWW/Internet 2004. Vol. 2, IADIS Press, Madrid, 2004, pp. 937–940.
LibreCat | Files available
 

2004 | Conference Paper | LibreCat-ID: 5664 | OA
How Security Problems Can Compromise Remote Internet Voting Systems
G. Schryen, in: Workshop of the ESF TED Programme, 2004, pp. 121–131.
LibreCat | Files available
 

2004 | Book Chapter | LibreCat-ID: 5666 | OA
Neulich am Hotspot - Bringt Mobiles Internet die Menschen ins Netz?
G. Schryen, in: G. Gehrke (Ed.), Digitale Teilung - Digitale Integration : Perspektiven Der Internetnutzung, KOPAED-Verlag, München, 2004, pp. 45–51.
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2003 | Book | LibreCat-ID: 5629
Online Marktforschung im Mittelstand: Analyse von Konsumentenverhalten in 3D-Internet-Welten
G. Schryen, J. Herstell, M. Schoenen, Online Marktforschung Im Mittelstand: Analyse von Konsumentenverhalten in 3D-Internet-Welten, Deutscher Universitäts-Verlag, Wiesbaden, 2003.
LibreCat
 

2003 | Journal Article | LibreCat-ID: 5630 | OA
Online-Marktforschung - Analyse von Konsumentenverhalten in virtuellen Umgebungen, in: Information Management & Consulting, 18,2
G. Schryen, J. Herstell, IM : Die Zeitschrift Für Information Management Und Consulting 18 (2003) 74–77.
LibreCat | Files available
 

2003 | Book Chapter | LibreCat-ID: 5667
E-Democracy: Internet Voting
G. Schryen, in: Proceedings of the IADIS International Conference WWW Internet 2003. Vol. 2, IADIS Press, Algarve, 2003, pp. 1017–1021.
LibreCat
 

2003 | Conference Paper | LibreCat-ID: 5668 | OA
Internet-Wahlen
G. Schryen, in: 6. Internationale Tagung Wirtschaftsinformatik, 2003, pp. 937–956.
LibreCat | Files available
 

2002 | Conference Paper | LibreCat-ID: 5620 | OA
Data Warehouse in der Marktforschung - Analyse von Benutzeraktivitäten in virtuellen Welten
G. Schryen, M. Schoenen, in: Data Warehousing 2002, 2002, pp. 103–119.
LibreCat | Files available
 

2002 | Journal Article | LibreCat-ID: 5623 | OA
Elektronisches Papier - Display-Technologie mit weitem Anwendungsspektrum
G. Schryen, J. Karla, Wirtschaftsinformatik 44 (2002) 567–574.
LibreCat | Files available
 

2002 | Journal Article | LibreCat-ID: 5669 | OA
Elektronische Zeitung - das Erbe Gutenbergs?
G. Schryen, I-Com. Zeitschrift Für Interaktive Und Kooperative Medien (2002) 36–37.
LibreCat | Files available
 

2001 | Book | LibreCat-ID: 5670
Komponentenorientierte Softwareentwicklung in Softwareunternehmen: Konzeption eines Vorgehensmodells zur Einführung und Etablierung
G. Schryen, Komponentenorientierte Softwareentwicklung in Softwareunternehmen: Konzeption Eines Vorgehensmodells Zur Einführung Und Etablierung, Deutscher Universitäts-Verlag, Wiesbaden, 2001.
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