Project Leader Physical Cryptography Project, IGSSE, TUM-IAS

E-Mail	ruehrmai@in.tum.de
Room	00.09.060
Phone	+49.89.289.17854
Fax	+49.89.289.18107
Address	Institut für Informatik VI Technische Universität München Boltzmannstraße 3 85748 Garching bei München Germany
Homepage	http://www6.in.tum.de/Main/Ruehrmai

Current Projects

Physical Cryptography Project

Publications

Journals

1. U. Rührmair, C. Jaeger, M. Bator, M. Stutzmann, P. Lugli, G. Csaba: Applications of High-Capacity Crossbar Memories in Cryptography. IEEE Transactions on Nanotechnology, 2010.
2. C. Jaeger, M. Algasinger, U. Rührmair, G. Csaba, M. Stutzmann: Random p-n-junctions for physical cryptography. Applied Physics Letters 96, 172103 (2010).
3. H. Langhuth, S. Frederic, M. Kaniber, J. Finley, U. Rührmair: Strong Photoluminescence Enhancement from Colloidal Quantum Dot Near Silver Nano-Island Films. Journal of Fluorescence, 2010.
4. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, M. Stutzmann, U. Rührmair: Circuit-based Approaches to SIMPL Systems. Journal of Circuits, Systems and Computers, 2011.
5. P. Lugli, A. Mahmoud, G. Csaba, M. Algasinger, M. Stutzmann, U. Rührmair: Physical Unclonable Functions based on Crossbar Arrays for Cryptographic Applications. International Journal of Circuit Theory and Applications, 2012.
6. U. Rührmair, M. van Dijk: On the Practical Use of Physical Unclonable Functions in Oblivious Transfer and Bit Commitment Protocols. Journal of Cryptographic Engineering, 2013.
7. U. Rührmair, J. Sölter, F. Sehnke, X. Xu, A. Mahmoud, V. Stoyanova, G. Dror, J. Schmidhuber, W. Burleson, S. Devadas: PUF Modeling Attacks on Simulated and Silicon Data. IEEE Transactions on Information Forensics and Security, 2013 (to appear).

1. U. Rührmair, C. Jaeger, M. Bator, M. Stutzmann, P. Lugli, G. Csaba: Applications of High-Capacity Crossbar Memories in Cryptography. IEEE Transactions on Nanotechnology, 2010.

2. C. Jaeger, M. Algasinger, U. Rührmair, G. Csaba, M. Stutzmann: Random p-n-junctions for physical cryptography. Applied Physics Letters 96, 172103 (2010).

3. H. Langhuth, S. Frederic, M. Kaniber, J. Finley, U. Rührmair: Strong Photoluminescence Enhancement from Colloidal Quantum Dot Near Silver Nano-Island Films. Journal of Fluorescence, 2010.

4. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, M. Stutzmann, U. Rührmair: Circuit-based Approaches to SIMPL Systems. Journal of Circuits, Systems and Computers, 2011.

5. P. Lugli, A. Mahmoud, G. Csaba, M. Algasinger, M. Stutzmann, U. Rührmair: Physical Unclonable Functions based on Crossbar Arrays for Cryptographic Applications. International Journal of Circuit Theory and Applications, 2012.

6. U. Rührmair, M. van Dijk: On the Practical Use of Physical Unclonable Functions in Oblivious Transfer and Bit Commitment Protocols. Journal of Cryptographic Engineering, 2013.

7. U. Rührmair, J. Sölter, F. Sehnke, X. Xu, A. Mahmoud, V. Stoyanova, G. Dror, J. Schmidhuber, W. Burleson, S. Devadas: PUF Modeling Attacks on Simulated and Silicon Data. IEEE Transactions on Information Forensics and Security, 2013 (to appear).

Conferences

8. Q. Chen, G. Csaba, X. Ju, S.B. Natarajan, P. Lugli, M. Stutzmann, U. Schlichtmann, U. Rührmair: Analog Circuits for Physical Cryptography. 12th International Symposium on Integrated Circuits (ISIC2009), Singapore, December 14 16, 2009. (This paper received the Best Paper Award.)
9. M. Steinebach, S. Zmudsinski, S. Katzenbeisser, U. Rührmair: Audio watermarking forensics: detecting malicious re-embedding. Proceedings of IS&T SPIE Electronic Imaging 2010 Conference - Media Forensics and Security XII, San Jose, CA, USA, January 17 21, 2010.
10. U. Rührmair, C. Jaeger, C. Hilgers, M. Algasinger, G. Csaba, M. Stutzmann: Security Applications of Diodes with Unique Current-Voltage Characteristics. 14th International Conference on Financial Cryptography and Data Security, Tenerife (Spain), January 25-28, 2010. Lecture Notes in Computer Science, Volume 6052. Springer, 2010.
11. G. Csaba, X. Ju, Z. Ma, Q. Chen, W. Porod, J. Schmidhuber, U. Schlichtmann, P. Lugli, U. Rührmair: Application of Mismatched Cellular Nonlinear Networks for Physical Cryptography. 12th IEEE CNNA International Workshop on Cellular Nanoscale Networks and their Applications, Berkeley, CA, USA, February 3 5, 2010.
12. U. Rührmair, Q. Chen, M. Stutzmann, P. Lugli, U. Schlichtmann, G. Csaba: Towards Electrical, Integrated Implementations of SIMPL Systems. Workshop in Information Security Theory and Practice (WISTP 2010), Passau (Germany), 2010. Lecture Notes in Computer Science, Volume 6033, pp. 277 292. Springer, 2010.
13. U. Rührmair, S. Katzenbeisser, M. Steinebach, S. Zmudzinski: Watermark-Based Authentication and Key Exchange in Teleconferencing Systems. Communications and Multimedia Security, Linz (Austria), May 31 June 2, 2010. Lecture Notes in Computer Science, Volume 6109, pp. 75 80. Springer, 2010.
14. U. Rührmair: Oblivious Transfer based on Physical Unclonable Functions (Extended Abstract). Third International Conference on Trust and Trustworthy Computing, Berlin (Germany), June 21-23, 2010. Lecture Notes in Computer Science, Volume 6101, pp. 430 440. Springer, 2010.
15. F. Sehnke, C. Osendorfer, J. Sölter, J. Schmidhuber, U. Rührmair: Policy Gradients for Cryptanalysis. 20th International Conference on Artificial Neural Networks (ICANN 2010), Thessaloniki, Greece, September 15-18, 2010. Proceedings, Part III. Lecture Notes in Computer Science, Volume 6354. Springer, 2010.
16. U. Rührmair, F. Sehnke, J. Sölter, G. Dror, S. Devadas, J. Schmidhuber: Modeling Attacks on Physical Unclonable Functions. 17th ACM Conference on Computer and Communications Security, Chicago (Illinois), October 4-8, 2010.
17. U. Rührmair: SIMPL Systems, Or: Can We Design Cryptographic Hardware without Secret Key Information? 37th Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2011), Nový Smokovec, Slovakia, January 22-28, 2011. Lecture Notes in Computer Science, Volume 6543, Springer, 2011.
18. U. Rührmair, C. Jaeger, M. Algasinger: An Attack on PUF-based Session Key Exchange, and a Hardware-based Countermeasure: Erasable PUFs. 15th International Conference on Financial Cryptography and Data Security, St. Lucia, February 28 March 4, 2011.
19. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, U. Rührmair: The Bistable Ring PUF: A New Architecture for Strong Physical Unclonable Functions. HOST 2011.
20. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, U. Rührmair: Characterization of the Bistable Ring PUF. DATE 2012.
21. U. Rührmair, M. van Dijk: Practical Security Analysis of PUF-based Two-Player Protocols. CHES 2012.
22. U. Rührmair, M. van Dijk: PUFs in Security Protocols: Attack Models and Security Evaluations. IEEE Symposium on Security and Privacy (Oakland'13), 2013.

8. Q. Chen, G. Csaba, X. Ju, S.B. Natarajan, P. Lugli, M. Stutzmann, U. Schlichtmann, U. Rührmair: Analog Circuits for Physical Cryptography. 12th International Symposium on Integrated Circuits (ISIC2009), Singapore, December 14 16, 2009. (This paper received the Best Paper Award.)

9. M. Steinebach, S. Zmudsinski, S. Katzenbeisser, U. Rührmair: Audio watermarking forensics: detecting malicious re-embedding. Proceedings of IS&T SPIE Electronic Imaging 2010 Conference - Media Forensics and Security XII, San Jose, CA, USA, January 17 21, 2010.

10. U. Rührmair, C. Jaeger, C. Hilgers, M. Algasinger, G. Csaba, M. Stutzmann: Security Applications of Diodes with Unique Current-Voltage Characteristics. 14th International Conference on Financial Cryptography and Data Security, Tenerife (Spain), January 25-28, 2010. Lecture Notes in Computer Science, Volume 6052. Springer, 2010.

11. G. Csaba, X. Ju, Z. Ma, Q. Chen, W. Porod, J. Schmidhuber, U. Schlichtmann, P. Lugli, U. Rührmair: Application of Mismatched Cellular Nonlinear Networks for Physical Cryptography. 12th IEEE CNNA International Workshop on Cellular Nanoscale Networks and their Applications, Berkeley, CA, USA, February 3 5, 2010.

12. U. Rührmair, Q. Chen, M. Stutzmann, P. Lugli, U. Schlichtmann, G. Csaba: Towards Electrical, Integrated Implementations of SIMPL Systems. Workshop in Information Security Theory and Practice (WISTP 2010), Passau (Germany), 2010. Lecture Notes in Computer Science, Volume 6033, pp. 277 292. Springer, 2010.

13. U. Rührmair, S. Katzenbeisser, M. Steinebach, S. Zmudzinski: Watermark-Based Authentication and Key Exchange in Teleconferencing Systems. Communications and Multimedia Security, Linz (Austria), May 31 June 2, 2010. Lecture Notes in Computer Science, Volume 6109, pp. 75 80. Springer, 2010.

14. U. Rührmair: Oblivious Transfer based on Physical Unclonable Functions (Extended Abstract). Third International Conference on Trust and Trustworthy Computing, Berlin (Germany), June 21-23, 2010. Lecture Notes in Computer Science, Volume 6101, pp. 430 440. Springer, 2010.

15. F. Sehnke, C. Osendorfer, J. Sölter, J. Schmidhuber, U. Rührmair: Policy Gradients for Cryptanalysis. 20th International Conference on Artificial Neural Networks (ICANN 2010), Thessaloniki, Greece, September 15-18, 2010. Proceedings, Part III. Lecture Notes in Computer Science, Volume 6354. Springer, 2010.

16. U. Rührmair, F. Sehnke, J. Sölter, G. Dror, S. Devadas, J. Schmidhuber: Modeling Attacks on Physical Unclonable Functions. 17th ACM Conference on Computer and Communications Security, Chicago (Illinois), October 4-8, 2010.

17. U. Rührmair: SIMPL Systems, Or: Can We Design Cryptographic Hardware without Secret Key Information? 37th Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2011), Nový Smokovec, Slovakia, January 22-28, 2011. Lecture Notes in Computer Science, Volume 6543, Springer, 2011.

18. U. Rührmair, C. Jaeger, M. Algasinger: An Attack on PUF-based Session Key Exchange, and a Hardware-based Countermeasure: Erasable PUFs. 15th International Conference on Financial Cryptography and Data Security, St. Lucia, February 28 March 4, 2011.

19. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, U. Rührmair: The Bistable Ring PUF: A New Architecture for Strong Physical Unclonable Functions. HOST 2011.

20. Q. Chen, G. Csaba, P. Lugli, U. Schlichtmann, U. Rührmair: Characterization of the Bistable Ring PUF. DATE 2012.

21. U. Rührmair, M. van Dijk: Practical Security Analysis of PUF-based Two-Player Protocols. CHES 2012.

22. U. Rührmair, M. van Dijk: PUFs in Security Protocols: Attack Models and Security Evaluations. IEEE Symposium on Security and Privacy (Oakland'13), 2013.

Posters

23. H. Langhuth, U. Rührmair, J. Finley: Complex Nano-Plasmonic Hybrid Materials As Unique Objects in Physical Cryptography. 5th NTT-BRL school at NTT Atsugi R&D Center, Atsugi, Kanagawa, Japan, November 24-27, 2009.

23. H. Langhuth, U. Rührmair, J. Finley: Complex Nano-Plasmonic Hybrid Materials As Unique Objects in Physical Cryptography. 5th NTT-BRL school at NTT Atsugi R&D Center, Atsugi, Kanagawa, Japan, November 24-27, 2009.

Preprints

24. U. Rührmair: SIMPL Systems: On a Public Key Variant of Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/255, 2009.
25. U. Rührmair, J. Sölter, F. Sehnke: On the Foundations of Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/277, 2009.
26. U. Rührmair, Q. Chen, P. Lugli, M. Stutzmann, G. Csaba: Towards Electrical, Integrated Implementations of SIMPL Systems. Cryptology ePrint Archive, Report 2009/278, 2009.
27. G. Csaba, X. Ju, Q. Chen, W. Porod, J. Schmidhuber, U. Schlichtmann, P. Lugli, U. Rührmair: On-Chip Electric Waves: An Analog Circuit Approach to Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/246, 2009.
28. U. Rührmair, F. Sehnke, J. Sölter, G. Dror, S. Devadas, J. Schmidhuber: Modeling Attacks on Physical Unclonable Functions. Cryptology ePrint Archive, Report 2010/251, 2010.
29. U. Rührmair: Physical Turing Machines and the Formalization of Physical Cryptography. Cryptology ePrint Archive, Report 2011/188, 2011.
30. U. Rührmair: SIMPL Systems as a Keyless Cryptographic and Security Primitive. Cryptology ePrint Archive, Report 2011/189, 2011.
31. M. van Dijk, U. Rührmair: Physical Unclonable Functions in Cryptographic Protocols: Security Proofs and Impossibility Theorems. Cryptology ePrint Archive, Report 2012/228, 2012.
32. U. Rührmair, J. Sölter, F. Sehnke, X. Xu, A. Mahmoud, V. Stoyanova, G. Dror, J. Schmidhuber, W. Burleson, S. Devadas: PUF Modeling Attacks on Simulated and Silicon Data. Cryptology ePrint Archive, Report 2013/112, 2013.
33. U. Rührmair, C. Hilgers, S. Urban, A. Weiershäuser, E. Dinter, B. Forster, C. Jirauschek: Optical PUFs Reloaded. IACR Cryptology ePrint Archive 2013: 215 (2013)

24. U. Rührmair: SIMPL Systems: On a Public Key Variant of Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/255, 2009.

25. U. Rührmair, J. Sölter, F. Sehnke: On the Foundations of Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/277, 2009.

26. U. Rührmair, Q. Chen, P. Lugli, M. Stutzmann, G. Csaba: Towards Electrical, Integrated Implementations of SIMPL Systems. Cryptology ePrint Archive, Report 2009/278, 2009.

27. G. Csaba, X. Ju, Q. Chen, W. Porod, J. Schmidhuber, U. Schlichtmann, P. Lugli, U. Rührmair: On-Chip Electric Waves: An Analog Circuit Approach to Physical Unclonable Functions. Cryptology ePrint Archive, Report 2009/246, 2009.

28. U. Rührmair, F. Sehnke, J. Sölter, G. Dror, S. Devadas, J. Schmidhuber: Modeling Attacks on Physical Unclonable Functions. Cryptology ePrint Archive, Report 2010/251, 2010.

29. U. Rührmair: Physical Turing Machines and the Formalization of Physical Cryptography. Cryptology ePrint Archive, Report 2011/188, 2011.

30. U. Rührmair: SIMPL Systems as a Keyless Cryptographic and Security Primitive. Cryptology ePrint Archive, Report 2011/189, 2011.

31. M. van Dijk, U. Rührmair: Physical Unclonable Functions in Cryptographic Protocols: Security Proofs and Impossibility Theorems. Cryptology ePrint Archive, Report 2012/228, 2012.

32. U. Rührmair, J. Sölter, F. Sehnke, X. Xu, A. Mahmoud, V. Stoyanova, G. Dror, J. Schmidhuber, W. Burleson, S. Devadas: PUF Modeling Attacks on Simulated and Silicon Data. Cryptology ePrint Archive, Report 2013/112, 2013.

33. U. Rührmair, C. Hilgers, S. Urban, A. Weiershäuser, E. Dinter, B. Forster, C. Jirauschek: Optical PUFs Reloaded. IACR Cryptology ePrint Archive 2013: 215 (2013)

Invited Speaker at Conferences/Workshops

34. Ulrich Rührmair: On the Formal Foundations of Physical Unclonable Functions. Security Hardware in Theory and Practice A Marriage of Convenience. Event 08253, Schloss Dagstuhl, Germany, 2008.
35. Ulrich Rührmair: Physical Cryptography, Or: How to Realize Cryptography and Security by Random, Disordered, and Unclonable Physical Structures. 37th Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2011), Slovakia, 2011.

34. Ulrich Rührmair: On the Formal Foundations of Physical Unclonable Functions. Security Hardware in Theory and Practice A Marriage of Convenience. Event 08253, Schloss Dagstuhl, Germany, 2008.

35. Ulrich Rührmair: Physical Cryptography, Or: How to Realize Cryptography and Security by Random, Disordered, and Unclonable Physical Structures. 37th Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2011), Slovakia, 2011.

Invited Book Chapters

36. U. Rührmair, H. Busch, S. Katzenbeisser: Strong PUFs: Models, Constructions and Security Proofs. In A.-R. Sadeghi, P. Tuyls (Editors): Towards Hardware Intrinsic Security: Foundation and Practice. Springer, 2010.
37. U. Rührmair, S. Devadas, F. Koushanfar: Security based on Physical Unclonability and Disorder. In M. Tehranipoor and C. Wang (Editors): Introduction to Hardware Security and Trust. Springer, 2011.
38. U. Rührmair: SIMPL Systems as a Keyless Cryptographic and Security Primitive. In: D. Naccache (Ed.), Festschrift of J.-J. Quisquater, Lecture Notes in Computer Science, Vol. 6805, Springer, 2012.

36. U. Rührmair, H. Busch, S. Katzenbeisser: Strong PUFs: Models, Constructions and Security Proofs. In A.-R. Sadeghi, P. Tuyls (Editors): Towards Hardware Intrinsic Security: Foundation and Practice. Springer, 2010.

37. U. Rührmair, S. Devadas, F. Koushanfar: Security based on Physical Unclonability and Disorder. In M. Tehranipoor and C. Wang (Editors): Introduction to Hardware Security and Trust. Springer, 2011.

38. U. Rührmair: SIMPL Systems as a Keyless Cryptographic and Security Primitive. In: D. Naccache (Ed.), Festschrift of J.-J. Quisquater, Lecture Notes in Computer Science, Vol. 6805, Springer, 2012.

Some Other Activities

PC Member

HOST 2011
HOST 2012

HOST 2011

HOST 2012

Reviewer

IEEE Transactions on Information Forensics and Security
IEEE Transactions on Computers
IEEE Transactions on Circuits and Systems-Part I
IEEE Transactions on Very Large Scale Integration Systems
IEEE Journal on Emerging and Selected Topics in Circuits and Systems
AFRICACRYPT
Etc.

IEEE Transactions on Information Forensics and Security

IEEE Transactions on Computers

IEEE Transactions on Circuits and Systems-Part I

IEEE Transactions on Very Large Scale Integration Systems

IEEE Journal on Emerging and Selected Topics in Circuits and Systems

AFRICACRYPT

Etc.

Ulrich Rührmair, M.Sc.