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Researcher Profile

Dr. Sebastian Ramacher

Dr. Sebastian Ramacher

Function

Scientist

Center

Digital Safety & Security

Competence Unit

Security & Communication Technologies

E-Mail

Sebastian.Ramacher(at)ait.ac.at

Phone

+43 50550 4209

Address

Giefinggasse 4, 1210 Vienna

Career

Field: Cyber Security

Main Research: Cryptography

Experience: My main research interests are in the field of public key cryptography with a focus on post-quantum signature schemes and modern public key building blocks, including various forms of encryption and signature schemes, as well as their application in secure communication and cloud computing. I am one of the designers of the Picnic post-quantum digital signature scheme, which is currently a round 2 candidate candiate in NIST's post-quantum crypto standardization project.

  • 2016-2019: University assistent
    IAIK, Graz University of Technolog / Austria
  • 2015-2016: Project assistent
    IAIK, Graz University of Technolog / Austria

Publications

  • Post-Quantum Zero-Knowledge and Signatures from Symmetric-Key Primitives
    Author(s): Melissa Chase, David Derler, Steven Goldfeder Claudio Orlandi, Sebastian Ramacher, Christian Rechberger, Daniel Slamanig, Greg Zaverucha
    Conference ACM CCS, Dallas, USA
  • Linear Equivalence of Block Ciphers with Partial Non-Linear Layers: Application to LowMC
    Author(s): Itai Dinur, Daniel Kales, Angela Promitzer, Sebastian Ramacher, Christian Rechberger
    Conference EUROCRYPT 2019, Darmstadt, Germany
  • Feistel Structures for MPC, and More
    Author(s): Martin R. Albrecht, Lorenzo Grassi, Léo Perrin, Sebastian Ramacher, Christian Rechberger, Dragos Rotaru, Arnab Roy, Markus Schofnegger
    Conference ESORICS 2019
  • Revisiting User Privacy for Certificate Transparency
    Author(s): Daniel Kales, Olamide Omolola, Sebastian Ramacher
    Conference EuroS&P 2019
  • Short Double- and N-Times-Authentication-Preventing Signatures from ECDSA and More
    Author(s): David Derler, Sebastian Ramacher, Daniel Slamanig
    Conference EuroS&P 2018
  • Revisiting Proxy Re-encryption: Forward Secrecy, Improved Security, and Applications
    Author(s): David Derler, Stephan Krenn, Thomas Lorünser, Sebastian Ramacher, Daniel Slamanig, Christoph Striecks
    Conference PKC 2018
  • Post-Quantum Zero-Knowledge Proofs for Accumulators with Applications to Ring Signatures from Symmetric-Key Primitives
    Author(s): David Derler, Sebastian Ramacher, Daniel Slamanig
    Conference PQCrypto 2018
  • Generic Double-Authentication Preventing Signatures and a Post-quantum Instantiation
    Author(s): David Derler, Sebastian Ramacher, Daniel Slamanig
    Conference ProvSec 2018
  • Homomorphic Proxy Re-Authenticators and Applications to Verifiable Multi-User Data Aggregation
    Author(s): David Derler, Sebastian Ramacher, Daniel Slamanig
    Conference FC 2017
  • IT security (2016)
    Graz University of Technology
  • IT security (2017)
    Graz University of Technology
  • IT security (2018)
    Graz University of Technology
  • Modern public key cryptography (2017)
    Graz University of Technology
  • Modern public key cryptography (2018)
    Graz University of Technology
  • Modern public key cryptography (2019)
    Graz University of Technology

Further Information

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