In Preparation

1. “(Efficient) Universally Composable Two-Party Computation Using a Minimal Number of Stateless Tokens”
   with S. G. Choi, J- Katz, A. Yerukhimovich, and H.-S. Zhou.
   A preliminary version is available.
2. “History-Free Sequential Aggregate Signatures”
   with Marc Fischlin and Anja Lehmann
   A preliminary version is available.
3. “Security of Blind Signatures Revisited”
   with Dominique Unruh.
   A preliminary version is available.

Journal Articles

1. “Security of Blind Signatures Under Aborts and Applications to Adaptive Oblivious Transfer” with Marc Fischlin
   Journal of Mathematical Cryptology (JMC), Issue 2, Oct. 2011, pp. 169-203

Articles in refereed conferences and workshops

1. “Uniqueness is a Different Story: Impossibility of Verifiable Random Functions from Trapdoor Permutations” with Dario Fiore
   9th Theory of Cryptography Conference (TCC) 2012
   A preliminary version is available.
2. “How to Aggregate the CL Signature”
   European Symposium on Research in Computer Security (ESORICS) 2011
   The proceedings version is available.
3. “Round Optimal Blind Signatures” with Dominique Unruh (VIDEO)
   Appeared as a merge with S. Garg, V. Rao, and A. Sahai
   CRYPTO 2011
   The proceedings version is available and our submitted version also.
4. “Impossibility of Blind Signatures from One-Way Permutations” with Jonathan Katz and Arkady Yerukhimovich
   8th Theory of Cryptography Conference (TCC) 2011
   The proceedings version (© IACR) is available.
5. “Expedient Non-Malleability Notions for Hash Functions” with Paul Baecher and Marc Fischlin
   RSA 2011 --- Cryptographers' Track
   The proceedings version is available.
6. “On the Impossibility of Three-Move Blind Signature Schemes” with Marc Fischlin
   Eurocrypt 2011
   The proceedings version is available.
7. “Unlinkability of Sanitizable Signatures” with Christina Brzuska, Marc Fischlin, and Anja Lehmann
   Public-Key Cryptography (PKC) 2010
   The full version is available.
8. “Confidential Signatures and Deterministic Signcryption” with Alexander W. Dent, Marc Fischlin, Mark Manulis, Martijn Stam
   Public-Key Cryptography (PKC) 2010
   The full version is available.
9. “History-Free Aggregate Message Authentication Codes” with O. Eikemeier, M. Fischlin, J.-F. Goetzmann, A. Lehmann, P. Schröder, D. Wagner
   Conference on Security and Cryptography for Networks (SCN) 2010
   The proceedings version is available.
10. “Generic Constructions for Verifiably Encrypted Signatures without Random Oracles or NIZKs” with Markus Rückert and Michael Schneider
    Applied Cryptography and Network Security (ACNS) 2010
    The proceedings version is available.
11. “Redactable Signatures for Tree-Structured Data: Definitions and Construction” with C. Brzuska, H. Busch, Ö. Dagdelen, M. Fischlin, M. Franz, S. Katzenbeisser, M. Manulis, C. Onete, A. Peters and B. Poettering.
    Applied Cryptography and Network Security (ACNS) 2010
    The proceedings version is available.
12. “Fair Partially Blind Signatures” with Markus Rückert
    Africacrypt 2010
    The proceedings version is available.
13. “Public-Key Encryption with Non-interactive Opening: New Constructions and Stronger Definitions” with D. Galindo, B. Libert, M. Fischlin, G. Fuchsbauer, A. Lehmann, and M. Manulis
    Africacrypt 2010
    The proceedings version is available.
14. “CAPTCHAs: The Good, the Bad, and the Ugly” with P. Baecher, L. Gordon, M. Fischlin, and M. L\uetzow
    Sicherheit 2010
    The proceedings version is available.
15. “Security of Blind Signatures Under Aborts” with Marc Fischlin
    Public-Key Cryptography (PKC) 2009
    The full version is available.
16. “Security of Sanitizable Signatures Revisited” with Christina Brzuska, Marc Fischlin, Tobias Freudenreich, Anja Lehmann, Marcus Page, Jakob Schelbert, and Florian Volk
    Public-Key Cryptography (PKC) 2009
    The full version is available.
17. “Sanitizable Signatures: How to Partially Delegate Control for Authenticated Data” with Christina Brzuska, Marc Fischlin, and Anja Lehmann
    BIOSIG 2009
    The proceedings version is available.
18. “Security of Verifiably Encrypted Signatures and a Construction Without Random Oracles” with Markus Rückert
    Pairings 2009
    The proceedings version is available.
19. “Aggregate and Verifiably Encrypted Signatures from Multilinear Maps without Random Oracles” with Markus Rückert
    Conference on Information Security and Assurance (ISA) 2009
20. “Mobi: Eine Infrastruktur fuer das Internet der Dinge” with Michael Doering
    Informatiktage 2006.

PhD Thesis

“On the Complexity of Blind Signatures” Darmstadt University of Technology, Germany, 2010 Includes Results from the following papers and also some additional, unpublished results:

• “On the Impossibility of Three Move Blind Signatures”
• “Impossibility of Blind Signatures from One-Way Permutations”
• “Security of Blind Signatures Under Aborts”