• Trust and security of transaction systems
• Wireless information security on application and transport layer
• Trust environments and the interaction with non-trusted components and networks
• Authentication in fixed mobile convergence
• Privacy mechanisms for mobile environment
• Identity, credential and profile management techniques
• Single Sign On methods and Web Services security
• Digital Rights Management methods

I'm married and have two daughters. My family web site is http://www.holtmanns.eu/

Education

2000 -- Ph.D in Mathematics from the University of Paderborn

1996 - 2000 -- Study stays at Universidad Politecnica de Valencia and the Universidad de alencia

1996 -- Degree Diplom Mathematikerin from the University of Paderborn

1990 – 1996 -- Study of Mathematics with secondary subject Computer Science at the University of Paderborn and the Heriot-Watt University Edinburgh (Scotland) and the EU study program TEMPUS in Debrecen and Budapest (Hungary)

1989 – 1990 -- Training year at Computer Aided Design - CAD Zeichensysteme Reintjes

1987 – 1989 -- Commercial College in Kempen (Höhere Handelsschule)

1985 – 1987 -- Commercial School in Kempen (Handelsschule)

1980 – 1985 -- Catholic Secondary School in Wachtendonk (Hauptschule)

Public Projects and Standardization Activities

To make security happen, I believe it is important to "look over the fence" and work closely together with customers, universities, competitors and other industrial players. For this reason, I have been involved during my carrer directly or indirectly in many standardization and multi-partner projects.

European Union and governmental funded projects

MoFS Mobile Financial Services (TEKES Project) 

SERENITY System Engineering for Security and Dependability Project

MobiLife Project

Ambient Networks

PAMPAS Project (EU Roadmap project, Pioneering Advance Mobile Privacy and Security)

3GET - 3G Evolving Techologies (funded by the German ministry of research and development - BMBF)

RAPID Roadmap for Advance Research in Privacy and IDentity Management

WWI Wireless World Initiative

EICTA (European Industry Association – Information Systems, Communications Security and Consumer Electronics) Trust and Security Area

Media Lab Europe (Dublin) and MIT (Massachusetts Institute of Technology, Boston)

Standardization Activities

3GPP SA3 Security. This is my main focus, but I'm also involved in other groups (e.g. CT1, CT4, SA4) activities related to my "core" specifications. I'm currently rapporteur of seven 3GPP Security Specifications and Reports:

• TS 33.220 Generic Bootstrapping Architecture, http://www.3gpp.org/ftp/Specs/html-info/33220.htm
• TS 33.221 Support for Subscriber Certificates, http://www.3gpp.org/ftp/Specs/html-info/33221.htm
• TS 33.223 GBA Push Function, http://www.3gpp.org/ftp/Specs/html-info/33223.htm
• TR 33.980 3GPP and Liberty Alliance Interworking, http://www.3gpp.org/ftp/Specs/html-info/33980.htm
• TR 33.920 SIM card based GBA, http://www.3gpp.org/ftp/Specs/html-info/33920.htm
• TR 33.905 Recommendations for trusted open platforms, http://www.3gpp.org/ftp/Specs/html-info/33905.htm
• TR 33.924 Identity Management and 3GPP Security Interworking

Liberty Alliance Project

TISPAN (Telecoms & Internet converged Services & Protocols for Advanced Networks) - Security

OMA / WAP Forum Security, e-Commerce, and some others ....

2008

Silke Holtmanns, N. Asokan, Philip Ginzboorg, Pekka Laitinen, Valtteri Niemi,

"Cellular Authentication for Mobile and Internet Services - Overview and Application of the Generic Bootstrapping Architecture", Wiley (2008) (Amazon Link)

Silke Holtmanns, Günther Horn, Wolf-Dietrich Möller

"Identity Management in Mobile Communication Systems", book chapter in the Handbook of Communication Networks and Distributed Systems (editor Sudip Misra), World Scientific, Singapore (to be published early 2009)

Silke Holtmanns, Pekka Laitinen,

"Generic Application Security in Current and Future Networks", Chapter in "Handbook of Research on Wireless Security", Idea Group Inc. (2008), (Link to publisher)

Zheng Yan, Silke Holtmanns,

"Context Aware Adaptive Trust", Book Chapter in "Computer Security, Privacy and Politics" of Idea Group Inc (2008) (Link to publisher)

2007

Silke Holtmanns,

"Anwendungssicherheit und Identitätsmanagement", Digma, Zeitschrift fuer Datenrecht und Informationssicherheit (Journal for Data Protection and Information Security), September 2007.

Mika Klemettinen (editor), Göran Schultz, Johan Hjelm, Markus Miettinen, Silke Holtmanns et. al.,

"Enabling Technologies for Mobile Services - The MobiLife Book", Wiley, 2007 (Amazon Link).

Silke Holtmanns, Son Phan-Anh,

"Access Authentication to IMS Systems in Next Generation Networks", 6th International Conference on Networking, ICN 2007, Sainte-Luce, Martinique.

Silke Holtmanns, Katri Sarkio,

"Tailored Trustworthiness Estimations in Peer-to-Peer Networks", International Journal of Internet Technology and Secured Transactions (IJITST) 1, Inderscience (2007), pp 95 - 107, Discussion of the article.

2006

Stefano Campadello, Silke Holtmanns,

"Security Patterns in Mobile Communications", 1^st International Workshop on Secure Information Systems (SIS’06), Wisla, Poland (accepted, but withdrawn)

Silke Holtmanns, Göran Schultz,

"Mobile and Fixed Network Convergence -Authentication to IMS in Fixed Broadband Access Systems", Proceedings of ICIN Convergence in Service, Media and Networks, 2006, Bordeaux, France.

Olivier Coutant, Ronald van Eijk, Silke Holtmanns,

"Sharing of preferences and context in groups of mobile users", Computer Human Interaction (CHI 2006) Mobile Social Software Workshop, Montreal, Canada, Computer Human Interaction CHI 2006 Conference Proceedings and Extended Abstracts, New York, ACM Press.

Johan Hjelm, Silke Holtmanns,

Privacy and Trust Visualization", Computer Human Interaction CHI 2006 Conference Proceedings and Extended Abstracts, New York, ACM Press, Montréal, Canada.

Silke Holtmanns,

"Trust and Security in Mobile Broadcast Systems", Proceedings of 11. Mobilfunktagung Technologien und Anwendungen Fachtagung (2006), VDE Verlag GmbH Berlin, (11th Mobile Communication Specialist Conference) Osnabrueck, Germany.

Silke Holtmanns, Shreekanth Lakshmeshwar, Seamus Moloney, Katri Sarkio,

"A role for the cellular network in improving the security of ubiquitous communications", 3nd International Workshop on Managing Ubiquitous Communications and Services (MUCS) Autonomic Pervasive Computing & Communications in cooperation with Pervasive 2006, Cork, Ireland.

Zheng Yan, Silke Holtmanns,

"Context Aware Adaptive Trust", Ambient Intelligence Developments Conference (AmI), 2006, Sophia Antipolis, France.

Silke Holtmanns, Stefano Campadello,

"Ambient Intelligence Software Architectures - a Serivce Oriented Architecture Approach", Ambient Intelligence Developments Conference (AmI), 2006, Sophia Antipolis, France.

Silke Holtmanns, Tomas Perlines Hormann, Konrad Wrona,

"Evaluation of certificate validation mechanisms", Special Issue of Computer and Communications – Network Security, COMCOM 2688, (Elsevier)

2005

Silke Holtmanns, Katri Ylitalo,

"Tailored Trustworthiness Estimations in Peer-to-Peer Environments", SECOVAL’2005, International Conference on Security and Privacy for Emerging Areas in Communication Networks in cooperation with the IEEE TC on Security and Privacy, Athens, Greece

Olivier Coutand, Olaf Drögehorn, Klaus David, Petteri Nurmi, Patrik Floréen, Ralf Kernchen, Silke Holtmanns, Stefano Campadello, Theo Kanter, Miquel Martin, Ronald van Eijk, Renata Guarneri,

"Context-aware Group Management in mobile environments" (paper 322), IST Mobile & Wireless Communications Summit 2005, Dresden, Germany

Stefano Campadello, Olivier Coutand, Christian del Rosso, Silke Holtmanns, Theo Kanter, Christian Räck, Bernd Mrohs, Stephan Steglich,

"Trust and Privacy in Context-Aware Support for Communication in Mobile Groups", Context Awareness for Proactive Systems (CAPS) 2005, Helsinki, Finland

Silke Holtmanns, Göran Schultz,

"User Authentication to Services in Converging Mobile and Fixed Networks", Wireless World Research Forum Meeting "Convergence & Seamless Mobility", Mobile Summit #15 (2005), Paris, France

Ronald van Eijk, Johan Hjelm, Silke Holtmanns, Göran Schultz,

"Privacy Management Using Policy Decision and Enforcement - Single User Privacy and Sharing Data among a Group in a Distributed System", Wireless World Research Forum Meeting "Convergence & Seamless Mobility", Mobile Summit #15 (2005), Paris, France

2004

Frank Hartung, Silke Holtmanns,

Privacy Rights Management", 6th International Conference on Enterprise Information Systems – Wireless Information Systems (WIS-ICEIS 2004), Porto, Portugal

Klaus-Dieter Bierstedt, Silke Holtmanns,

"Weak holomorphy and other weak properties," Bull. Soc. Roy. Sci. Liège 72, 6 (2004), pp 377 – 381

N. Asokan, Philip Ginzboorg, Silke Holtmanns, Pekka Laitinen, Valtteri Niemi,

"Extending cellular authentication as a service", IEE Secure Mobile Communications Symposium, London, UK (2004)

2003

J. Claessens, A. Fuchsberger, C. Günther, S. Holtmanns, G. Horn, K. Howker, R. J. Hulsebosch, C. Mitchell, K. Paterson, B. Preneel, D. Schellekens, and M. Schuba,

"Pioneering Advanced Mobile Privacy and Security" Special Addendum to the Proceedings of the 18th IFIP International Information Security Conference (SEC 2003).

Silke Holtmanns,

"Mobile Web Service Security" Proc. of the 2nd European Conference on Information Warfare and Security (ECIW 2003)

J. Claessens, A. Fuchsberger, C. Günther, S. Holtmanns, G. Horn, K. Howker, R.J. Hulsebosch, C. Mitchell, K. Paterson, B. Preneel, D. Schellekens, and M. Schuba,

"Pioneering Advanced Mobile Privacy and Security" Chapter in Security for Mobility, editor Chris Mitchell, IEE Publishing (2003).

Silke Holtmanns,

"Mobile Web Service Security", Journal of Information Warfare (2003).

2002

Silke Holtmanns, Marcin Toczydlowski,

"Private mail retrieval by searching on encrypted data in an untrusted domain" in Proc. The First International Workshop on Wireless Information Systems at the 4th International Conference on Enterprise Systems (WIS ICEIS 2002)

Silke Holtmanns,

"Privacy in mobile environment" in Proc. of the 13th International Conference and Workshop on Database and Expert Systems Applications (DEXA’02) - Trust and Privacy in Digital Business (TrusBus)

Silke Holtmanns, Marcin Toczydlowski,

"Confidential mobile mail retrieval" in Special Issue of Computer and Communications - Ubiquitous Computing (Elsevier) Volume 26, Issue 11, (2002), pp 1219-1224

2001

Martin Gerdes, Silke Holtmanns,

"Mobile payment solutions", Towards the E-Society, Proceedings of the First IFIP Conference: E-Commerce, E-Business, and E-Government (I3E) (2001), Kluwer Academic Publishers, 629 – 642

2000

Silke Holtmanns, Ph. D. Thesis,

"Operator representation and biduals of weighted function spaces"

Klaus-Dieter Bierstedt, Silke Holtmanns,

"An operator representation for weighted inductive limits of spaces of vector valued holomorphic functions", Bull. Belg. Math. Soc. 7 (2000) pp 1 - 13

1999

Klaus-Dieter Bierstedt, Silke Holtmanns,

"An operator representation for weighted spaces of vector valued holomorphic functions", Results in Mathematics 36 (1999) pp 9 – 20

1996

Silke Holtmanns,

Diploma Thesis "Regularity in inductive limits and spaces of holomorphic functions with growth conditions"

Reviewer and Program Committee

I've been in the PC for many conferences and try to compile a list in the near future.

I'm co-inventor and inventor of many protected ideas and enjoyed developing the ideas together with my collegues.