Christian Matt

Christian Matt

I am a research scientist at Primev. Previously, I was a senior researcher at Concordium and a postdoctoral scholar at the University of California, Santa Barbara, supervised by Huijia Lin. Before joining UCSB, I completed my PhD in computer science at ETH Zurich under the supervision of Ueli Maurer, and my undergraduate studies at Karlsruhe Institute of Technology (KIT).

Conference Papers

Practical Provably Secure Flooding for Blockchains

Chen-Da Liu-Zhang, Christian Matt, Ueli Maurer, Guilherme Rito, and Søren Eller Thomsen
Advances in Cryptology—ASIACRYPT 2022

GearBox: Optimal-size Shard Committees by Leveraging the Safety-Liveness Dichotomy

Bernardo David, Bernardo Magri, Christian Matt, Jesper Buus Nielsen, and Daniel Tschudi
ACM CCS 2022

Formalizing Delayed Adaptive Corruptions and the Security of Flooding Networks

Christian Matt, Jesper Buus Nielsen, and Søren Eller Thomsen
Advances in Cryptology—CRYPTO 2022

Policy-Compliant Signatures

Christian Badertscher, Christian Matt, and Hendrik Waldner
Theory of Cryptography (TCC) 2021

Weight-Based Nakamoto-Style Blockchains

Simon Holmgaard Kamp, Bernardo Magri, Christian Matt, Jesper Buus Nielsen, Søren Eller Thomsen, and Daniel Tschudi
Progress in Cryptology—LATINCRYPT 2021

Afgjort: A Partially Synchronous Finality Layer for Blockchains

Thomas Dinsdale-Young, Bernardo Magri, Christian Matt, Jesper Buus Nielsen, and Daniel Tschudi
Security and Cryptography for Networks (SCN) 2020

Indistinguishability Obfuscation Without Multilinear Maps: New Paradigms via Low Degree Weak Pseudorandomness and Security Amplification

Merge of [AJS18] and [LM18]
Prabhanjan Ananth, Aayush Jain, Huijia Lin, Christian Matt, and Amit Sahai
Advances in Cryptology—CRYPTO 2019

How to Leverage Hardness of Constant-Degree Expanding Polynomials over R to build iO

Merge of [JS18] and [LM18]
Aayush Jain, Huijia Lin, Christian Matt, and Amit Sahai
Advances in Cryptology—EUROCRYPT 2019

Strengthening Access Control Encryption

Christian Badertscher, Christian Matt, and Ueli Maurer
Advances in Cryptology—ASIACRYPT 2017

Robust Authenticated Encryption and the Limits of Symmetric Cryptography

Christian Badertscher, Christian Matt, Ueli Maurer, Phillip Rogaway, and Björn Tackmann
IMA International Conference on Cryptography and Coding (IMACC) 2015

Augmented Secure Channels and the Goal of the TLS 1.3 Record Layer

Christian Badertscher, Christian Matt, Ueli Maurer, Phillip Rogaway, and Björn Tackmann
Provable Security (ProvSec) 2015

Idealizing Identity-Based Encryption

Dennis Hofheinz, Christian Matt, and Ueli Maurer
Advances in Cryptology—ASIACRYPT 2015

A Definitional Framework for Functional Encryption

Christian Matt and Ueli Maurer
IEEE Computer Security Foundations Symposium (CSF) 2015

The One-Time Pad Revisited

Christian Matt and Ueli Maurer
IEEE International Symposium on Information Theory (ISIT) 2013

Journal Papers

Toward an Algebraic Theory of Systems

Christian Matt, Ueli Maurer, Christopher Portmann, Renato Renner, and Björn Tackmann
Theoretical Computer Science, 2018

Causal Boxes: Quantum Information-Processing Systems Closed Under Composition

Christopher Portmann, Christian Matt, Ueli Maurer, Renato Renner, and Björn Tackmann
IEEE Transactions on Information Theory, 2017

PhD Thesis

A Constructive Treatment of Enhanced Encryption Schemes

Christian Matt
ETH Zurich, 2017

Manuscripts

Pseudo Flawed-Smudging Generators and Their Application to Indistinguishability Obfuscation

Huijia Lin and Christian Matt
Manuscript, 2018