Publications & Talks

In the following you find a hopefully up-to-date list of my publications. Below you find a selection of talks I gave and (in most cases) my slides. The code related to my papers can be found here if not stated otherwise within the paper.

English Publications

Quantum preimage, 2nd-preimage, and collision resistance of SHA3. [pdf]
joint work with Jan Czajkowski, Leon Groot Bruinderink, and Christian Schaffner
preprint on IACR eprint, 2017

“Oops, I did it again” – Security of One-Time Signatures under Two-Message Attacks. [pdf]
joint work with Leon Groot Bruinderink
preprint on IACR eprint, 2016

From 5-pass MQ-based identification to MQ-based signatures. [pdf]
joint work with Ming-Shing Chen, Joost Rijneveld, Simona Samardjiska, Peter Schwabe
ASIACRYPT 2016

Semantic Security and Indistinguishability in the Quantum World. [pdf]
joint work with Tommaso Gagliardoni, Christian Schaffner
CRYPTO 2016

Flush, Gauss, and Reload — A Cache Attack on the BLISS Lattice-Based Signature Scheme. [pdf]
joint work with Leon Groot Bruinderink, Tanja Lange, Yuval Yarom
CHES 2016

Mitigating Multi-Target Attacks in Hash-based Signatures. [pdf]
joint work with Joost Rijneveld, Fang Song
PKC 2016

ARMed SPHINCS — Computing a 41KB signature in 16KB of RAM. [pdf]
joint work with Joost Rijneveld, Peter Schwabe
PKC 2016

XMSS: Extended Hash-Based Signatures. [html]
joint work with Denis Butin, Stefan-Lukas Gazdag, Aziz Mohaisen
IETF, Internet Draft, 2015. Latest version: 09 (March, 2017).

PALPAS – PAsswordLess PAssword Synchronization. [pdf]
joint work with Moritz Horsch, Johannes Buchmann
ARES 2015

Hash-based Signatures: An Outline for a New Standard. [pdf]
joint work with Stefan-Lukas Gazdag, Denis Butin, Johannes Buchmann
NIST Workshop on Cybersecurity in a Post-Quantum World, 2015

Bad directions in cryptographic hash functions. [pdf]
joint work with Daniel J. Bernstein, Tanja Lange, Ruben Niederhagen
ACISP 2015

SPHINCS: practical stateless hash-based signatures. [pdf]
joint work with Daniel J. Bernstein, Daira Hopwood, Tanja Lange, Ruben Niederhagen, Louiza Papachristodoulou, Michael Schneider, Peter Schwabe, Zooko Wilcox O’Hearn
Eurocrypt 2015

How to manipulate curve standards: a white paper for the black hat. [pdf]
joint work with Daniel J. Bernstein, Tung Chou, Chitchanok Chuengsatiansup, Tanja Lange, Ruben Niederhagen, Christine van Vredendaal
SSR 2015

Developing and testing SCoP – a visual hash scheme.
joint work with  Maina M. Olembo, Timo Kilian, Simon Stockhardt, Melanie Volkamer
Information Management & Computer Security, Vol. 22, No. 4, 2014

Revocation & Non-Repudiation: When the first destroys the latter. [pdf]
joint work with Johannes Braun, Franziskus Kiefer
EuroPKI 2013

Discrete Ziggurat: A Time-Memory Trade-off for Sampling from a Gaussian Distribution over the Integers. [pdf]
joint work with Johannes Buchmann, Daniel Cabarcas, Florian Göpfert, Patrick Weiden
Selected Areas in Cryptography 2013 (SAC’13)

Optimal Parameters for XMSS^MT. [pdf]
joint work with  Lea Rausch, Johannes Buchmann
MoCrySEn 2013

WOTS+ – Shorter Signatures for Hash-Based Signature Schemes. [pdf]
Africacrypt 2013

Instantiating Treeless Signature Schemes. [link]
joint work with Patrick Weiden, Daniel Cabarcas, Johannes Buchmann
preprint on IACR eprint, 2013

On the security of the Winternitz one-time signature scheme. [pdf]
joint work with Johannes Buchmann, Erik Dahmen, Sarah Ereth, Markus Rückert
International Journal of Applied Cryptography, Vol. 3, No. 1, 2013
An extended abstract appeared in Africacrypt 2011

Developing and Testing a Visual Hash Scheme. [pdf]
joint work with  Maina M. Olembo, Timo Kilian, Simon Stockhardt, Melanie Volkamer
Seventh International Symposium on Human Aspects of Information Security & Assurance (HAISA 2013)

How to avoid the Breakdown of Public Key Infrastructures – Forward Secure Signatures for Certificate Authorities. [pdf]
joint work with  Johannes Braun, Alexander Wiesmaier, Martin A. G. Vigil, Johannes Buchmann
EuroPKI 2012

Forward Secure Signatures on Smart Cards. [pdf]
joint work with  Christoph Busold, Johannes Buchmann
Selected Areas in Cryptography 2012 (SAC’12)

XMSS – A Practical Forward Secure Signature Scheme based on Minimal Security Assumptions. [pdf]
joint work with Johannes Buchmann, Erik Dahmen
PQCrypto 2011

Security of invertible media authentication schemes revisited.
joint work with Daniel Dönigus, Stefan Endler, Marc Fischlin, Patrick Jäger, Anja Lehmann, Sergey Podrazhansky, Sebastian Schipp, Erik Tews, Sven Vowe, Matthias Walthart, Frederik Weidemann
Information Hiding, 2007.

German Publications:

Langzeitsichere Signaturen durch den Einsatz hashbasierter Signaturverfahren.
(Long-term secure signatures using hash-based signature schemes)
joint work with Johannes Braun
13. Deutscher IT-Sicherheitskongress 2013

Effiziente Umsetzung des Kettenmodells unter Verwendung vorwärtssicherer Signaturverfahren.
(An efficient implementation of the chain model using forward secure signature schemes)
joint work with Johannes Braun, Moritz Horsch
13. Deutscher IT-Sicherheitskongress 2013

Postquantum Signaturverfahren Heute.
(Post-quantum signatures today)
joint work with Albrecht Petzoldt, Michael Schneider, Sidi Mohamed El Yousfi Alaoui
22. SIT-Smartcard Workshop 2012

Technical Reports:

Schlanke Infrastrukturen für den digitalen Rechtsverkehr – Vorwärtssichere Verfahren für qualifizierte elektronische Signaturen.
joint work with Johannes Braun, Alexander Wiesmaier
ISPRAT final project report, 2012

Thesis

Practical Forward Secure Signatures using Minimal Security Assumptions. [link]
PhD Thesis, TU Darmstadt, 2013

Passwordsitter 2.0 – Analyse des Verbesserungspotentials und Weiterentwicklung.
Diploma Thesis, TU Darmstadt, 2008

Invited / Conference Talks:

Summer School on Post-Quantum Cryptography, Eindhoven, Netherlands (06/2017)
Hash-based signatures. [pptx] [pdf]

Awesome IT 2017, Amsterdam, Netherlands (04/2017)
Post-Quantum Cryptography & Privacy. [pptx] [pdf]

Crypto Working Group, Utrecht, Netherlands (03/2017)
Semantic Security and Indistinguishability in the Quantum World. [pptx] [pdf]

“Peaks in Dutch Cyber Security Research” at ICT.OPEN 2017, Amersfoort, Netherlands (03/2017)
Flush, Gauss, and Reload — A Cache Attack on the BLISS Lattice-Based Signature Scheme. [pptx] [pdf]

SmartSec Europe 2016, Amsterdam, Netherlands (11/2016)
Post-quantum Cryptography. [pptx] [pdf]

4th ETSI/IQC Workshop on Quantum-Safe Cryptography, Toronto, Canada (09/2016)
The H2020 PQCRYPTO project, an update. [pdf]

Crossing Seminar, TU Darmstadt, Germany (06/2016)
From 5-pass MQ-based identification to MQ-based signatures. [pdf]

IWR Kolloquium, Universität Heidelberg, Germany (06/2016)
Post-Quantum Cryptography & Privacy. [pptx] [pdf]

Security in Times of Surveillance, Eindhoven, Netherlands (05/2016)
Quantum Computing vs. Your Privacy. [pptx] [pdf]

CFRG@Eurocrypt’16, Vienna, Austria (05/2016)
XMSS Signatures. [pptx] [pdf]

IETF 95, Buenos Aires, Argentina (04/2016)
draft-irtf-cfrg-xmss-hash-based-signatures-03. [pdf]

FSE 2016 rump session, RUB, Bochum, Germany (03/2016)
Call for fast short-input hash functions. [pdf]

PKC 2016, Academia Sinica, Taipei, Taiwan (03/2016)
Mitigating Multi-Target Attacks in Hash-based Signatures. [pptx] [pdf]

PQCrypto Winterschool, Fukuoka, Japan (02/2016)
Hash-based signatures. [pptx] [pdf] [ video ]

ECC-Brainpool, BSI, Bonn, Germany (02/2016)
Hash-based signatures@CFRG. [pptx] [pdf]

TU Graz, Graz, Austria (01/2016)
Mitigating Multi-Target Attacks in Hash-based Signatures. [pptx] [pdf]

3rd ETSI/IQC Workshop on Quantum-Safe Cryptography, Seoul, South Korea (10/2015)
Recent Developments in Quantum Safe Crypto: Hash-based Signatures. [pptx] [pdf]

3rd ETSI/IQC Workshop on Quantum-Safe Cryptography, Seoul, South Korea (10/2015)
The H2020 PQCRYPTO Project. [pdf]

Dagstuhl Seminar Quantum Cryptanalysis, Schloss Dagstuhl, Germany (09/2015)
An update on hash-based signatures. [pptx] [pdf]

IQC Waterloo, ON, Canada (08/2015)
An update on hash-based signatures. [pptx] [pdf]

Australasian Conference on Information Security and Privacy, Brisbane, Australia (07/2015)
Bad directions in cryptographic hash functions. [pdf]

Summer school on real-world crypto and privacy, Šibenik, Croatia (06/2015)
Hash-based signatures. [pptx] [pdf]

Crypto Working Group, Utrecht, Netherlands (05/2015)
SPHINCS: practical stateless hash-based signatures. [pptx] [pdf]

Workshop on the International View of Cryptography and Security and Their Use in Practice VII, Sofia, Bulgaria (05/2015)
Standardization of hash-based signatures. [pdf]

Eurocrypt 2015, Sofia, Bulgaria (04/2015)
SPHINCS: practical stateless hash-based signatures. [pdf]

NIST Workshop on Cybersecurity in a Post-Quantum World, Gaithersburg, MD, USA (04/2015)
Panel: Shoring up the Infrastructure: A strategy for Standardizing Hash Signatures.

NIST Workshop on Cybersecurity in a Post-Quantum World, Gaithersburg, MD, USA (04/2015)
Hash-based Signatures: An outline for a new standard. [pdf]

IETF 92, Dallas, TX, USA (03/2015)
XMSS: Extended Hash-Based Signatures. [pdf]

Centrum Wiskunde & Informatica (CWI), Amsterdam, Netherlands (02/2015)
Hash-Based Signatures and SPHINCS. (see slides for DIMACS workshop)

DIMACS Workshop on The Mathematics of Post-Quantum Cryptography, Piscataway, NJ, USA (01/2015)
Hash-Based Signatures and SPHINCS. [pptx] [pdf]

Verisign SARL, Fribourg, Switzerland (11/2014)
SPHINCS: practical stateless hash-based signatures. [pptx] [pdf]

ETSI 2nd Quantum-Safe Crypto Workshop, Ottawa, ON, Canada (10/2014)
Towards A Standard for Practical Hash-based Signatures. [pptx] [pdf]

PQCrypto Summer School, Waterloo, ON, Canada (09/2014)
Hash-based Signatures. [link] [ video ] (incl. Johannes Buchmann’s part)

CDC Oberseminar TU Darmstadt, Germany (07/2014)
Practical Stateless Hash-based Signatures. [pptx] [pdf]

Crypto Working Group, Utrecht, Netherlands (05/2014)
Practical Forward Secure Signatures using Minimal Security Assumptions. [pptx] [pdf]

Workshop on the International View of Cryptography and Security and Their Use in Practice V, Copenhagen, Denmark (05/2014)
XMSS – Practical Hash-Based Signatures. [pptx]  [pdf]

PhD defense, Darmstadt, Germany (09/2013)
Practical Forward Secure Signatures using Minimal Security Assumptions. [pptx]

CAST Workshop Smartcards, Darmstadt, Germany (09/2013)
Forward Secure Hash-based Signatures on Smartcards. [pptx]

MoCrySEn 2013, Regensburg, Germany (09/2013)
Optimal Parameters for XMSS^MT. [pptx]

Africacrypt 2013, Cairo, Egypt (06/2013)
WOTS+ – Shorter Signatures for Hash-Based Signature Schemes. [ppt]

13. Deutscher IT-Sicherheitskongress 2013, Bonn, Germany (05/2013)
Langzeitsichere Signaturen durch den Einsatz hashbasierter Signaturverfahren. [pptx]

SAC 2012, Windsor, ON, Canada (08/2012)
Forward Secure Signatures on Smart Card. [pptx]

22. SIT-Smartcard Workshop, Darmstadt, Germany (02/2012)
Postquantum Signaturverfahren Heute.

PQ Crypto 2011,  Taipei, Taiwan (12/2011)
XMSS – A Practical Forward Secure Signature Scheme based on Minimal Security Assumptions. [pptx]

Africacrypt 2011, Dakar, Senegal (07/2011)
On the security of the Winternitz one-time signature scheme.

GI Kryptotag 2010, Darmstadt, Germany (11/2010)
Forward Security for Hash-Based Signatures.

Scientific Service

I served on the program committee of PQ-Crypto’17, and
as reviewer for Crypto’11, PQ-Crypto’11, Inscrypt’12, PQ-Crypto’13, SAC’13, FSE’14, PQ-Crypto’14, Asiacrypt’14, Latincrypt’14, Indocrypt’14, STACS’15, PKC’15, Latincrypt’15, Asiacrypt’15, Eurocrypt’16, ArcticCrypt’16, AsiaCCS’17, QCrypt’17, The Computer Journal, IET Information Security, IEEE Transactions on Computers, International Journal of Services Technology and Management, Journal of Information Security and Applications, Journal of Cryptographic Engineering, ‘Design, Codes, and Cryptography’, Journal of Mathematical Cryptology.