Jean Paul Degabriele Technology Innovation Institute Cryptography Research Center Masdar City Abu Dhabi, U.A.E. email: jeanpaul.degabriele [at] tii [dot] ae twitter: @jpdega

I am a Principal Researcher at the Cryptography Research Center in TII and a Research Group Leader in the Computer Science Department at TU Darmstadt, where I lead the Cryptography and Network Security Group. My main area of research is cryptography, with an emphasis on real-world applications and rigorous security analysis. Previously I held postdoctoral positions in the Cryptoplexity Group at TU Darmstadt, Royal Holloway University of London, and the University of Maryland. I earned my PhD from Royal Holloway in 2014 under the supervision of Kenny Paterson. I hold an MSc in Information Security from Royal Holloway and a Bachelor of Engineering from the University of Malta.

Research Interests

• Real-World Cryptographic Protocols such as TLS, SSH, IPsec, Tor and EMV.

• Symmetric Cryptography, mostly relating to Provably-Secure Schemes.

• Security Definitions and Bridging the Gap Between Cryptographic Theory and Practice.

• Defenses Against Mass Surveillance.
  
  

Publications

• SoK: Efficient Design and Implementation of Polynomial Hash Functions over Prime Fields
  Jean Paul Degabriele, Jan Gilcher, Jérôme Govindenand, and Kenneth G. Paterson
  IEEE Symposium on Security and Privacy - Oakland 2024

• Populating the Zoo of Rugged Pseudorandom Permutations [pdf]
  Jean Paul Degabriele and Vukašin Karadžić
  Advances in Cryptology - ASIACRYPT 2023

• The Indifferentiability of the Duplex and its Practical Applications [pdf]
  Jean Paul Degabriele, Marc Fischlin, and Jérôme Govinden
  Advances in Cryptology - ASIACRYPT 2023

• Overloading the Nonce: Rugged PRPs, Nonce-Set AEAD, and Order-Resilient Channels [pdf]
  Jean Paul Degabriele and Vukašin Karadžić
  Advances in Cryptology - CRYPTO 2022

• The Security of ChaCha20-Poly1305 in the Multi-User Setting [pdf]
  Jean Paul Degabriele, Jérôme Govinden, Felix Günther, and Kenneth G. Paterson
  ACM Conference on Computer and Communications Security - CCS 2021

• Hiding the Lengths of Encrypted Messages via Gaussian Padding [pdf]
  Jean Paul Degabriele
  ACM Conference on Computer and Communications Security - CCS 2021

• Sponges Resist Leakage: The Case of Authenticated Encryption [pdf]
  Jean Paul Degabriele, Christian Janson, and Patrick Struck
  Advances in Cryptology - ASIACRYPT 2019

• Simulatable Channels: Extended Security that is Universally Composable and Easier to Prove [pdf]
  Jean Paul Degabriele and Marc Fischlin
  Advances in Cryptology - ASIACRYPT 2018

• Untagging Tor: A Formal Treatment of Onion Encryption [pdf]
  Jean Paul Degabriele and Martijn Stam
  Advances in Cryptology - EUROCRYPT 2018

• A Surfeit of SSH Cipher Suites [pdf]
  Martin Albrecht, Jean Paul Degabriele, Torben Hansen, and Kenneth G. Paterson
  ACM Conference on Computer and Communications Security - CCS 2016 - Best paper award

• Backdoors in Pseudorandom Number Generators: Possibility and Impossibility Results [pdf]
  Jean Paul Degabriele, Kenneth G. Paterson, Jacob C.N. Schuldt, and Joanne Woodage
  Advances in Cryptology - CRYPTO 2016

• A More Cautious Approach to Security Against Mass Surveillance [pdf]
  Jean Paul Degabriele, Pooya Farshim, and Bertram Poettering
  Fast Software Encryption - FSE 2015

• Unpicking PLAID - A Cryptographic Analysis of an ISO-standards-track Authentication Protocol [pdf]
  Jean Paul Degabriele, Victoria Fehr, Marc Fischlin, Tommaso Gagliardoni, Felix Gunther, Giorgia Azzurra Marson,
  Arno Mittelbach, and Kenneth G. Paterson
  Security Standardisation Research - SSR 2014

• On Symmetric Encryption with Distinguishable Decryption Failures [pdf]
  Alexandra Boldyreva, Jean Paul Degabriele, Kenneth G. Paterson, and Martijn Stam
  Fast Software Encryption - FSE 2013

• Security of Symmetric Encryption in the Presence of Ciphertext Fragmentation [pdf]
  Alexandra Boldyreva, Jean Paul Degabriele, Kenneth G. Paterson, and Martijn Stam
  Advances in Cryptology - EUROCRYPT 2012

• On the Joint Security of Encryption and Signature in EMV [pdf]
  Jean Paul Degabriele, Anja Lehmann, Kenneth G. Paterson, Nigel P. Smart, and Mario Strefler
  Cryptographer's Track RSA 2012

• Provable Security in the Real World
  Jean Paul Degabriele, Kenneth G. Paterson, and Gaven J. Watson
  IEEE Security and Privacy Magazine May/June 2011

• On the (In)Security of IPsec in MAC-then-Encrypt Configurations [pdf]
  Jean Paul Degabriele and Kenneth G. Paterson
  ACM Conference on Computer and Communications Security - CCS 2010

• Economic Aspects of a Utility Computing Service
  Jean Paul Degabriele and David Pym
  International ICST Conference on Networks for Grid Applications - GridNets 2007

• Attacking the IPsec Standards in Encryption-only Configurations [pdf]
  Jean Paul Degabriele and Kenneth G. Paterson
  IEEE Symposium on Security and Privacy - Oakland 2007
  
  

Academic Service

• Program Committee Member

  • 2024: ACNS.

  • 2023: PKC, CRYPTO, ACM CCS, Security Standardisation Research, IMA ICCC.

  • 2022: Real World Crypto, EUROCRYPT, ACM CCS, CT-RSA.

  • 2021: Real World Crypto, CT-RSA, Financial Cryptography, CoronaDef (NDSS Affiliated Workshop).

  • 2019: Real World Crypto, CRYPTO, SAC, Security Standardisation Research

  • 2018: Financial Cryptography, Security Standardisation Research, ProvSec

  • 2017: CT-RSA, Financial Cryptography, Latincrypt

  • 2015: ACNS

• External Reviewer

  • 2022: CRYPTO, Journal of Cryptology

  • 2021: EUROCRYPT, CRYPTO

  • 2020: CT-RSA, ACM TOPS, TCS Journal, CRYPTO

  • 2019: The Computer Journal

  • 2018: EUROCRYPT, PKC, Formal Aspects of Computing, ACM CCS, TCC

  • 2017: EUROCRYPT, CRYPTO, PQCRYPTO

  • 2016: EUROCRYPT, FSE, CRYPTO, TCC, ACM CCS, SAC

  • 2015: EUROCRYPT, Elsevier Computers & Security, Journal of Mathematical Cryptology, IMACC

  • 2013: IEEE Transactions on Information Forensics and Security

  • 2012: AFRICACRYPT, CRYPTO, EUROCRYPT

  • 2011: CRYPTO, EUROCRYPT, FSE

• Event Organisation

  • IACR–CROSSING School on Combinatorial Techniques in Cryptography
  • SPY – Surveillance, Privacy, and You (EUROCRYPT 2019 Affiliated Event)
  • COST-IACR School on Randomness in Cryptography
    
    

PhD Thesis

• Authenticated Encryption in Theory and in Practice [pdf]
  
  

Presentations

• Rugged Pseudorandom Permutations and Their Applications - Talk given at RWC 2022

• Untagging Tor: A Tale of Onions, Raccoons, and Security Definitions - Talk given at RWC 2018

• A Surfeit of SSH Cipher Suites - Talk given at CCS 2016

• A More Cautious Approach to Security Against Mass Surveillance - Talk given at FSE 2015

• On the Joint Security of Encryption and Signature in EMV - Talk given at CT-RSA 2012

• On the (In)Security of IPsec in MAC-then-Encrypt Configurations - Talk given at CCS 2010