Talks

  1. Fast SNARK-based Non-Interactive Distributed Verifiable Random Function with Ethereum Compatibility. ACM ASIACCS 2025, Hanoi, Vietnam, 27.08.2025
  2. Secure Cloud through Cryptography: Research Approaches to Encryption and Authentication. RI CODE Annual Conference, Munich, Germany, 09.07.2025
    Invited talk
  3. Asynchronous Remote Key Generation (ARKG) and its Applications. SKECH 2024: Secure Key Exchange and Channel Protocols, Bertinoro, Italy, 05.06.2024
    Invited talk
  4. Selected Topics in Private Data Processing. Privacy Computing Course @ Graduate Summer School, Shandong University, Virtual/ China, 18.07.2023
    Invited lectures
  5. Asynchronous Remote Key Generation and its Applications. ASSURED Scientific Workshop, TU Darmstadt, Germany, 26.04.2023
    Invited talk
  6. Asynchronous Remote Key Generation for Account Recovery and Delegation in WebAuthn. Codes and Cryptography Seminar, Paderborn University, Germany, 16.12.2022
    Invited talk
  7. On Account Recovery and Delegation in WebAuthn. Future of Personal Identification (FoPI) 2021 @ IEEE EuroS&P 2021, Virtual / Vienna, Austria, 06.09.2021
  8. Security Challenges for Satellite Constellations and Communications. CYSAT 2021, Virtual / Davos, CH, 18.03.2021
    Invited speaker and panelist
  9. Security in Future Technologies: Core Capabilities and Threats. EIT Digital Tech Networking Event, London, UK, 03.10.2019
    Invited panelist
  10. Reputation and Privacy in Gig. NCSC Annual ACE-CSR Conference, Stratford-upon-Avon, UK, 26.06.2019
    Invited talk
  11. Authentication with Privacy for Connected Cars: A research perspective. Cyber Security Focus Day @ Connected Cars'16, London, UK, 27.06.2016
    Invited talk
  12. Blind Password Registration for Verifier-based PAKE. ACM AsiaPKC 2016 @ ACM ASIACCS 2016, Xian, China, 30.05.2016
  13. A Modular Framework for Multi-Factor Authentication and Key Exchange. 1st International Conference on Research in Security Standardisation (SSR 2014), Egham, UK, 17.12.2014
  14. Secure Modular Password Authentication for the Web using Channel Bindings. 1st International Conference on Research in Security Standardisation (SSR 2014), Egham, UK, 17.12.2014
  15. Cryptography and Passwords. SafeNet Crypto Club, London, UK, 05.12.2014
    Invited talk
  16. Cryptographic Password Authentication with TLS Channel Bindings. SnT research seminar, University of Luxembourg, 20.11.2014
    Invited talk
  17. Zero-Knowledge Policy Checks for Passwords and Verifier-Based PAKE. SKECH@BiCi: Secure Key Exchange and Channel Protocols, Bertinoro, Italy, 05.06.2014
    Invited talk
  18. Oblivious Password Authentication for the Web. Number Theory and Cryptography, Darmstadt, Germany, 22.11.2013
    Invited talk
  19. A Framework for Multi-Factor Authentication. CryptoForma Network, 9th Meeting, Guildford, UK, 29.11.2012
  20. Relationships among Privacy Notions for Signatures. Dagstuhl-Seminar "Privacy-Oriented Cryptography", Dagstuhl, Germany, 20.09.2012
  21. Publicly Verifiable Ciphertexts. 8th International Conference on Security and Cryptography for Networks (SCN 2012), Amalfi, Italy, 06.09.2012
  22. Forward-Secure Hierarchical Predicate Encryption. 5th International Conference on Pairing-Based Cryptography (Pairing 2012), Cologne, Germany, 17.05.2012
  23. Pseudorandom Signatures. CryptoForma Network, 7th Meeting, Edinburgh, UK, 01.03.2012
  24. Group Signature with Constant Revocation Costs for Signers and Verifiers. 10th International Conference on Cryptology and Network Security 2011, Sanya, China, 11.12.2011
  25. Non-Interactive and Re-Usable UC String Commitments with Adaptive Security. ASIACRYPT 2011, Seoul, Korea, 07.12.2011 Crypto Seminar, IBM Research T.J. Watson, NY, USA, 01.12.2011
    Invited talk
  26. Social Authentication with Privacy. Royal Holloway, University of London, UK, 23.06.2011
    Invited talk
  27. Privacy-Oriented Cryptography for Social Clouds. LACS Seminar, University of Luxembourg, 19.05.2011
    Invited talk
  28. Cryptographic Approach to Private Social Clouds. Séminaire de Cryptographie, CELAR/Université de Rennes 1, Rennes, France, 06.05.2011
    Invited talk
  29. Practical Affiliation-Hiding Authentication from Improved Polynomial Interpolation. ACM Symposium on Information, Computer and Communications Security (ASIACCS 2011), Hong Kong, 24.03.2011
  30. Cryptographic Treatment of Private User Profiles. 15th International Conference on Financial Cryptography and Data Security (FC 2011), RLCPS, St. Lucia, 04.03.2011
  31. Affiliation-Hiding Authentication. Royal Holloway, University of London, UK 21.10.2010
    Invited talk
  32. Privacy via Group Authentication. Goethe University of Frankfurt, Germany 01.09.2010
    Invited talk
  33. Affiliation-Hiding Key Exchange with Untrusted Group Authorities. 8th International Conference on Applied Cryptography and Network Security (ACNS 2010), Beijing, China, 23.06.2010
  34. Flexible Group Key Exchange with On-Demand Computation of Subgroup Keys. AFRICACRYPT 2010, Stellenbosch, South Africa, 05.05.2010
  35. Privacy-Preserving Admission to Mobile Peer-to-Peer Groups. 8th IEEE Intl. Conference on Pervasive Computing and Communications, MP2P Workshop, Mannheim, Germany, 02.04.2010
  36. Fully Robust Tree-Diffie-Hellman Group Key Exchange. 8th International Conference on Cryptology and Network Security, Kanazawa, Ishikawa, Japan, 14.12.2009
  37. Parameterwahl für sichere zeitgemäße Verschlüsselung. CAST e.V. Workshop "Datenschutz", Darmstadt, Germany, 29.10.2009
    Invited talk
  38. Securing Roaming Access Inside Wireless Mesh Networks. 10th International Workshop on Information Security Applications, Busan, South Korea, 27.08.2009
  39. Group Key Exchange Enabling On-Demand Derivation of Peer-to-Peer Keys. 7th International Conference on Applied Cryptography and Network Security, Paris-Rocquencourt, France, 02.06.2009
  40. Non-Interactive Computation of Pairwise Keys in Group Diffie-Hellman Protocols. Workshop on Cryptographic Protocols and Public-Key Cryptography, BiCi, University Residential Center, Bertinoro (Forlì-Cesena), Italy, 26.05.2009
    Invited talk
  41. Authenticated Wireless Roaming via Tunnels. GI/HGI Wireless Security 2009, Bochum, Germany, 13.03.2009
    Invited talk
  42. The Concept of Wireless Roaming via Tunnels: Authentication and Key Establishment Issues. BCRYPT PhD Day, Leuven, Belgium, 13.10.2008
    Invited talk
  43. Fully Robust Group Key Exchange in the Presence of Opening Attacks. ACAC Seminar, Centre for Advanced Computing - Algorithms and Cryptography, Macquarie University, Sydney, Australia, 11.07.2008
    Invited talk
  44. Enforcing User-Aware Browser-Based Mutual Authentication with Strong Locked Same Origin Policy. 13th Australasian Conference on Information Security and Privacy, Wollongong, Australia, 07.07.2008
  45. Provably Secure Browser-Based User-Aware Mutual Authentication over TLS. ACM Symposium on Information, Computer and Communications Security, Tokyo, Japan, 20.03.2008
  46. Securing Group Key Exchange against Strong Corruptions. ACM Symposium on Information, Computer and Communications Security, Tokyo, Japan, 19.03.2008
  47. On Security Models and Compilers for Group Key Exchange Protocols. 2nd International Workshop on Security, Nara, Japan, 30.10.2007
  48. Provably Secure Framework for Information Aggregation in Sensor Networks. 7th International Conference on Computational Science and Applications, Kuala Lumpur, Malaysia, 27.08.2007
  49. Malicious Participants in Group Key Exchange: Key Control and Contributiveness in the Shadow of Trust. 4th International Conference on Autonomic and Trusted Computing, Hong Kong, China, 13.07.2007
  50. Browser-based Authentication Protocols for Naive Users. Western European Workshop on Research in Cryptology, Bochum, Germany, 06.07.2007
  51. Security-Enhancing Compilers for Group Key Exchange Protocols. UCL Crypto Group Seminar, Louvain-la-Neuve, Belgium, 20.06.2007
    Invited talk
  52. Strong Corruptions in Group Key Exchange. Workshop on Cryptographic Protocols, BiCi, University Residential Center, Bertinoro (Forli-Cesena), Italy 08.03.2007
    Invited talk
  53. Kryptographie und Datensicherheit. Im Rahmen des Weiterbildungsstudiums "IT-Sicherheit- Administration und Sicherheit von IT-Systemen und -Netzwerken", Ruhr-Universität Bochum, 10.02.2007
    Invited tutorial
  54. A Security Model for Group Key Exchange. ECRYPT-PROVILAB Meeting, Horst Görtz Institute for IT Security, Bochum, Germany 05.10.2006
  55. Group Signatures for Federated Systems. Séminaire de Cryptographie, CELAR/Université de Rennes 1, Rennes, France 02.06.2006
    Invited talk
  56. New Paradigms for Group Signatures in Federated Systems. 4. Kryptotag, Horst Görtz Institute for IT Security, Bochum, Germany 11.05.2006
  57. Property-Based Taming of Lying Mobile Nodes. IEEE International Workshop on Trusted and Autonomic Computing Systems, Vienna, Austria, 19.04.2006
  58. Linkable Democratic Group Signatures. 2nd Information Security Practice and Experience Conference, Hangzhou, China, 13.04.2006
  59. Democratic Group Signatures. ACM Symposium on Information, Computer and Communications Security, Taipei, Taiwan, 21.03.2006
  60. Kryptographie und Datensicherheit. Weiterbildungsstudium "IT-Sicherheit- Administration und Sicherheit von IT-Systemen und -Netzwerken", Ruhr-Universität Bochum, 17/02/2006
    Invited tutorial
  61. CGKA Protocols, Revisited for Mobile Ad-Hoc Groups. International Workshop on Wireless and Sensor Networks Security, Washington, USA, 07.11.2005
  62. Key Agreement for Heterogeneous Mobile Ad-Hoc Groups. International Workshop on Security in Networks and Distributed Systems, Fukuoka, Japan, 21.07.2005
  63. Binary Trees in Group Communication Security. PG seminar "Algebra and Geometry", Chair for Algebra and Geometry, Ruhr University Bochum, Germany, 17.12.2005
    Invited talk
  64. Pseudonym Generation Scheme for Ad-Hoc Group Communication. European Workshop on Security in Ad-Hoc and Sensor Networks, Heidelberg, Germany, 05.08.2004

Supervision and Visitors

Current researchers

  • Sohyun Jeon, PhD, Postdoc, since 04/2026, Universität der Bundeswehr München
  • Patrick Hough, PhD, Postdoc, since 08/2025, Universität der Bundeswehr München
  • Alan Pulval-Dady, RA/PhD student, since 02/2025, Universität der Bundeswehr München
  • Jerome Nguyen, RA/PhD student, since 08/2022, Universität der Bundeswehr München

Former PhD students

Former researchers

  • Federico Valbusa, RA, 05/2025 - 02/2026, Universität der Bundeswehr München
  • Hugo Nartz, RA, 02/2023 - 09/2025, Universität der Bundeswehr München
  • Matteo Salvino, RA, 10/2022 - 07/2025, Universität der Bundeswehr München
  • Constantin Catalin Dragan, Postdoc, 02/2018 - 02/2020, University of Surrey
  • Venkkatesh Sekar, RA/Software Developer, 09/2019 - 07/2021, University of Surrey

Visitors / Interns

  • Juan E. Rubio, 2018, University of Malaga, Spain
  • Venkkatesh Sekar, 2018, National Institute of Technology, Tiruchirappalli, India
  • Kaibin Huang, 2017, National Chengchi University, Taiwan
  • Ruei-Hau Hsu, 2011, National Sun Yat-sen University, Taiwan

Organised Events

  • CODE-Kolloquium at Universität der Bundeswehr München, co-organizer 2023-2024
  • Research workshop and networking event Cyber Security in Space, Jan 31, 2019 in Guildford, UK
  • Dagstuhl-Seminar on Privacy-Oriented Cryptography, Sep 17-21, 2012 in Dagstuhl, Germany, co-organized with Jan Camenisch, Gene Tsudik, and Rebecca Wright, Dagstuhl Report 2(9)
  • European Postdoctoral Day of Excellence in Cryptography, Nov 21, 2011 in Darmstadt, Germany
    with nine invited speakers from different European countries
  • PhD Summer School on Applied Cryptographic Protocols 2010, Sep 26 - Oct 1, 2010 in Mykonos, Greece, co-organised with Marc Fischlin and Aggelos Kiayias
  • International Workshop on Group-Oriented Cryptographic Protocols 2007, Jul 9, 2007 in Wroclaw, Poland, with special issue in IET Information Security as volume 2, issue 3, 2008

Conference Chair

Journal Editorial Boards

Session Chair

  • Cryptographic Protocols II - 22nd International Conference on Applied Cryptography and Network Security 2024
  • Cryptographic Protocols - 20th International Conference on Applied Cryptography and Network Security 2022
  • Applied Cryptography III - 25th European Symposium on Research in Computer Security 2020
  • Post-Quantum Cryptography - 17th International Conference on Applied Cryptography and Network Security 2019
  • Encryption, Signatures and Fundamentals - 19th Information Security Conference 2016
  • Attribute-based Cryptography - 19th European Symposium on Research in Computer Security 2014
  • Protocols and Combiners - 8th International Conference on Security and Cryptography for Networks 2012
  • Public Key Cryptography - 17th Australasian Conference on Information Security and Privacy 2012
  • Beyond Ordinary Signature Schemes - 15th IACR PKC 2012
  • Applied Crypto I - 9th International Conference on Applied Cryptography and Network Security 2011
  • Applied Cryptography I - 6th ACM Symposium on Information, Computer and Communications Security 2011
  • Wireless Network Security - 9th International Conference on Cryptology and Network Security 2010
  • Key Management - 8th International Conference on Applied Cryptography and Network Security 2010
  • Network Coding - 13th International Conference on Practice and Theory in Public Key Cryptography 2010
  • Networks - AFRICACRYPT 2010
  • Cryptographic Protocol and Schemes I - 8th International Conference on Cryptology and Network Security 2009
  • Hardware Implementation Security - 10th International Workshop on Information Security Applications 2009
  • Digital signatures, Hash functions and Protocols - 2nd International Workshop on Security 2007
  • Key Management - International Conference on Autonomic and Trusted Computing 2007
  • Security Protocols and Policies - International Workshop on Wireless and Sensor Networks Security 2005
  • Key Management - International Workshop on Security in Networks and Distributed Systems 2005

Program Committees

  • ACISP (Australasian Conference on Information Security and Privacy): 2019-2018, 2015, 2011-2009
  • ACM WiSec (ACM Conference on Wireless Network Security): 2011
  • ACNS (International Conference on Applied Cryptography and Network Security): 2027, 2023-2017, 2013-2010
  • AFRICACRYPT: 2016, 2014, 2011
  • ASIACCS (ACM Symposium on Information, Computer, and Communications Security): 2023-2022, 2015, 2011
  • AsiaPKC (ACM ASIA Public-Key Cryptography Workshop): 2017-2016
  • ATC (International Conference on Autonomic and Trusted Computing): 2007-2006
  • CANS (International Conference on Cryptology and Network Security): 2021, 2019, 2011-2009
  • CGMS (International Workshop on Computer Graphics, Multimedia, and Security): 2009
  • CT-RSA (The Cryptographers' Track at the RSA Conference): 2013
  • ESORICS (European Symposium on Research in Computer Security): 2023, 2020, 2018, 2014
  • EUROCRYPT: 2024
  • FC (International Conference on Financial Cryptography and Data Security): 2015-2013
  • ICICS (International Conference on Information and Communications Security): 2013-2011
  • ICISC (International Conference on Information Security and Cryptology): 2012-2009, 2007
  • IEEE MASS (IEEE International Conference on Mobile Ad Hoc and Sensor Systems): 2012-2011
  • IMA Conference on Cryptography and Coding: 2015
  • Inscrypt (China International Conference on Information Security and Cryptology): 2012
  • ISC (Information Security Conference): 2022-2019, 2017-2016, 2012-2010
  • IWSEC (International Workshop on Security): 2009-2007
  • KMIS (International Conference on Knowledge Management and Information Sharing): 2009
  • Pairing (International Conference on Pairing-based Cryptography): 2010
  • PENCIL (Workshop on Privacy Enhancing Cryptography in Ledgers): 2019
  • PKC (International Conference on Practice and Theory in Public Key Cryptography): 2026-2025, 2015-2014, 2010
  • POST (International Conference on Principles of Security and Trust): 2017
  • ProvSec (International Conference on Provable Security): 2017-2014, 2012
  • RFIDsec (Workshop on RFID Security): 2014
  • SecureComm (International Conference on Security and Privacy in Communication Networks): 2013-2012
  • SeSoc (IEEE International Workshop on Security and Social Networking): 2012-2010
  • SHPCS (Workshop on Security and High Performance Computing Systems): 2009-2008
  • SICHERHEIT: 2010
  • SNDS (Symposium on Security in Networks and Distributed Systems): 2007-2006
  • SocialComNet (International Workshop on Social Computing, Network, and Services): 2011
  • UASS (International Symposium on Ubiquitous Applications & Security Service): 2009-2007
  • WEWoRC (Western European Workshop on Research in Cryptology): 2015
  • WISA (International Workshop on Information Security Applications): 2010, 2008
  • WISSec (Benelux Workshop on Information and System Security): 2009
  • WISTP (IFIP International Workshop on Information Security Theory and Practice): 2012-2011

Selected Further Activities

More committee work

Reviewer for journals

  • © ACM: ACM Transactions on Information and System Security (TISSEC), Communications of the ACM (CACM)
  • © Springer: Journal of Cryptology, International Journal of Information Security, Designs, Codes, and Cryptography, Peer-to-Peer Networking and Applications
  • © IEEE: IEEE Transactions on Dependable and Secure Computing, IEEE Transactions on Information Theory, IEEE Transactions on Information Forensics & Security, IEEE Transactions on Wireless Communications, IEEE Transactions on Speech and Audio Processing
  • © Elsevier: Ad Hoc Networks, Computers & Security, Computer Communications, Computer Networks, Computer Standards & Interfaces, Journal of Information Security and Applications, Future Generation Computer Systems, Information Processing Letters, Information Sciences, Pervasive and Mobile Computing
  • © IOS: Journal of Computer Security
  • © Inderscience: International Journal of Applied Cryptography
  • © Wiley: International Journal of Communication Systems

I also participated as external reviewer to numerous conferences and workshops.