Picture of Silke Holtmanns

Silke Holtmanns

Espoo, Finland
Security Specialist

Biography

I am a security expert and research new attack vectors and mitigation approaches.  My current research area combines data analytics, machine learning and privacy. The creation of new and the investigation of existing security attacks using SS7 and Diameter via the Interconnect lead to new countermeasures for 4G/5G networks. These countermeasures using techniques that combine monitoring, filtering, and advanced protection with machine learning. As an expert on existing and future attack patterns for interconnection security, I provide advice to our company, customers, standard boards, and regional and national regulating governmental bodies.

I serve as a regular organizer and editor for workshops and special issues. Some of my upcoming call for papers include:
11th International Conference on Network and System Security - 5G Security Workshop

Special Issue on 5G Security (Rivers Publishers)

I have over 15 years experience in mobile security research and standardization with strong focus on 3GPP security and ETSI Smart Card Platform (eUICC). I'm rapporteur of ten 3GPP specifications and editor of the GSMA Interconnection Diameter Signalling Protection document.

Research Interests

  • Machine Learning
  • Network Security

Selected Articles and Publications

2017          

Athul Prassad, Silke Holtmanns, Mikko Uusitalo, Zexian Li, “Micro-Operator Networks – A Key Enabler for 5G in New Verticals and Markets”, IEEE Communications Magazine Network and Services Management Series (submitted)

Silke Holtmanns, “Securing realistically the future of mobile communication”, GSMA 360 Degree Privacy and Security (submitted)

Ian Oliver, Silke Holtmanns, “Providing for Privacy in a Network Infrastructure Protection”, ICIN conference Innovations in Cloud, Internet and Networks (ICIN), Paris, France (March 2016), accepted

Silke Holtmanns, Ian Oliver, “SMS and One-Time-Password Interception in LTE Networks”, ICC Paris, France (May 2017), accepted

2016                            

Silke Holtmanns, Siddharth Rao, Ian Oliver, Tuomas Aura, “User Location Tracking for LTE Networks – Using IWF”, IFIP Networking Conference, Vienna, Austria, IFIP Networking Digital Library (2016)

Silke Holtmanns, “Interconnection Security Standards – We are all connected”, Riverside Journal on ICT Standardization, November 2016

Silke Holtmanns, Bhanu Kotte, Siddharth Rao, “Detach me not”, Blackhat Europe, London, UK (2016)

Siddharth Rao, Silke Holtmanns, Ian Oliver, Tuomas Aura,The known and unkowns of SS7 and beyond, TelcoSecurity – Troopers, Heidelberg, Germany (2016)

Silke Holtmanns, Ian Oliver, Siddharth Rao, Tuomas Aura, “We know where you are”, Cycon NATO Cooperative Cyber Defense Centre of Exellence, Tallinn, Estonia (2016).

Ian Oliver, Yoan Miche, Aapo Kalliola, Silke Holtmanns, Amaury Lendasse, Anto Akusok, “Data Anonymization as a Vector Quantization Problem: Control over Privacy for Health Data”, Interantional Conference on Availability, Resilliance and Security (ARES) PALM Workshop, Salzburg, Austria (2016)

Silke Holtmanns, Bhanu Kotte, Siddharth Rao, “Privacy in LTE Networks”, 2nd International Workshop on 5G Security, MobiMedia, Xi’an, PRC (2015)

Setareh Roshan, Aapo Kalliola, Yoan Miche, Ian Oliver, Silke Holtmanns, Amaury Lendasse, Anton Akusok,Adaptive Network Intrusion Detection System using Extreme Learning Machines”, International Symposium on Extreme Learning Machines (ELM), Singapore, 2016

Aapo Kalliola, Yoan Miche, Ian Oliver, Silke Holtmanns, Buse Atli, Amaury Lendasse, Kaj-Mikael Bjork, Anton Akusok, Tuomas Aura,Learning Flow Characteristics Distributions with ELM for Distributed Denial of Service Detection and Mitigation”, International Symposium on Extreme Learning Machines (ELM), Singapore, 2016

Linas Laibinis, Elena Troubitsyna, Inna Pereverzeva, Ian Oliver, Silke Holtmanns, “A Formal Approach to Identifying Security Vulnerabilities in Telecommunication Networks”, 18th International Conference on Formal Engineering Methods (ICFEM 2016), Tokyo, Japan

2015                            

Yoan Miche, Silke Holtmans, Ian Oliver, Anton Akusok, Amaury Lendasse, Kaij-Mikael Bjork, “On Mutual Information over non-Euclidean Spaces, Data Mining and Data Privacy Levels”, International Symposium on Extreme Learning Machines (ELM), Hangzhou, PRC, 2015

Yoan Miche, Dare Abodunrin, Silke Holtmanns, “Some Dangers from 2G Network Legacy Support and a Possible Mitigation”, IEEE Conference on Communications and Network Security (CNS) 2015, September 28-30, 2015

Silke Holtmanns, Ian Oliver, “Sicherheit und Privacy innerhalb eines Mobilfunknetzwerkes”, Forum InformatikerInnen fuer Frieden und gesellschaftliche Verantworking (FIfF) Kommunikation, Ausgabe 4/2015

Siddhart Rao, Silke Holtmanns, Ian Oliver, Tuomas Aura, “Unblocking stolen mobile devices using SS7-MAP vulnerabilities”, 1St International Workshop on 5G Security, IEEE TrustCom, Helsinki (2015)

Ian Oliver, Silke Holtmanns, “Aligning the Conflicting Needs of Privacy, Malware Detection and Network Protection”, IEEE TrustCom, Helsinki (2015)

Silke Holtmanns, Ian Oliver, “Attacking the Internet of Things via the Roaming Network”, VDE Verlag Berlin, Mobilfunktagung, Osnabrueck, Germany (2015)

2009

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 (2009)

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), http://www.amazon.com/Cellular-Authentication-Mobile-Internet-Services/dp/0470723173/ref=sr_1_5?ie=UTF8&s=books&qid=1225699829&sr=8-5

Silke Holtmanns, Pekka Laitinen, "Generic Application Security in Current and Future Networks", Chapter in "Handbook of Research on Wireless Security", Idea Group Inc. (2008), http://www.igi-global.com/reference/details.asp?id=7308 Link to publisher

Zheng Yan, Silke Holtmanns, "Context Aware Adaptive Trust", Book Chapter in "Computer Security, Privacy and Politics" of Idea Group Inc (2008), http://www.igi-global.com/books/details.asp?id=7527 Link to publisher

2007                            

Mika Klemettinen (editor), Göran Schultz, Johan Hjelm, Markus Miettinen, Stafano Campadello, Silke Holtmanns et. Al., “Enabling Tecnologies for Mobile Services - The MobiLife Book”, Wiley (2007,), http://www.amazon.com/Enabling-Technologies-Mobile-Services-MobiLife/dp/0470512903/ref=sr_1_1?ie=UTF8&s=books&qid=1225701089&sr=1-1

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

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

Silke Holtmanns, Katri Sarkio,”Tailored Trustworthiness Estimations in Peer-to-Peer Networks”, International Journal of Internet Technology and Secured Transactions (IJITST), Inderscience (2007)

Silke Holtmanns, Pekka Laitinen, “Generic Application Security in Current and Future Networks”, Chapter for Handbook of Research on Wireless Security (Idea) Serenity, http://www.idea-group.com/requests/details.asp?ID=96, (2007)

Zheng Yan, Silke Holtmanns, “Context Aware Adaptive Trust”, Book Chapter for the book “Computer Security, Privacy and Politics” of Idea Group Inc (2007)

2006                            

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 (Mobilfunktagung) 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

Silke Holtmanns, Zheng Yan, “Context Aware Adaptive Trust”, Ambient Intelligence Developments Conference (AmI), 2006, Sophia Antipolis, France

Stefano Campadello, Silke Holtmanns, “Ambient Intelligence Software Architectures - a SOA Approach”, Ambient Intelligence Developments Conference (AmI), 2006, Sophia Antipolis, France

Stefano Campadello, Silke Holtmanns, “Security Patterns in Mobile Communications”, 1st International Workshop on Secure Information Systems (SIS’06), Wisla, Poland, accepted, but withdrawn

2005                             

Silke Holtmanns, Tomas Perlines Hormann, Konrad Wrona, “Evaluation of certificate validation mechanisms”, Special Issue of Computer and Communications – Network Security, COMCOM 2688, (Elsevier), http://dx.doi.org/10.1016/j.comcom.2004.12.008

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 Droegehorn, 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” Proceedings of the 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), 377 – 381

N. Asokan, Philip Ginzboorg, Silke Holtmanns, Pekka Laitinen, Valtteri Niemi, “Extending cellular authentication as a service”, Proceedings of the 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” 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” 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” 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” Special Issue of Computer and Communications - Ubiquitous Computing (Elsevier) Volume 26, Issue 11, 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”

K. D. Bierstedt, Silke Holtmanns, “An operator representation for weighted inductive limits of spaces of vector valued holomorphic functions”, Bull. Belg. Math. Soc. 7 (2000) 1 - 13.

1999                            

K. D. Bierstedt, Silke Holtmanns, “An operator representation for weighted spaces of vector valued holomorphic functions”, Results in Mathematics 36 (1999) 9 – 20.

1996                            

Silke Holtmanns, Diploma Thesis “Regularity in inductive limits and spaces of holomorphic functions with growth conditions”

Patents

Patents are ongoing part of my work. I have 37 patent families where at least one patent has been granted. To get a snapshot including the pending patent application, please consult: http://patents.justia.com/inventor/silke-holtmanns