Daniel Collins' Website
About Me:
I am currently a postdoc at Purdue University and Georgia Tech working with Vassilis Zikas and Juan Garay and have been since June 2024.
I obtained a PhD from EPFL, Switzerland in cryptography under the supervision of Serge Vaudenay in April 2024; I worked at EPFL from September 2019 to April 2024.
Before this, I studied Mathematics and Computer Science at the University of Sydney, where I spent time under the supervision of Vincent Gramoli in distributed computing which culminated in an Honours thesis.
So far, I work on or have worked on the following topics:
- Secure messaging and ratcheting, in both the two party and group settings
- Distributed computing (consensus and beyond)
- Side channels
- Symmetric cryptography
Please feel free to get in touch if you would like to chat or collaborate.
Preprints:
Publications:
- Real World Deniability in Messaging
Daniel Collins, Simone Colombo, Loïs Huguenin-Dumittan
PETS 2025 (to appear)
Presented at RWC 2023
[preprint]
[rwc talk]
[slides]
- On the Tight Security of the Double Ratchet
Daniel Collins, Doreen Riepel, Si An Oliver Tran
CCS 2024 (to appear)
[preprint]
- Provably Secure Online Authenticated Encryption and Bidirectional Online Channels
Arghya Bhattacharjee, Ritam Bhaumik, Daniel Collins, Mridul Nandi
SAC 2024 (to appear)
[preprint]
- K-Waay: Fast and Deniable Post-Quantum X3DH without Ring Signatures
Daniel Collins, Loïs Huguenin-Dumittan, Ngoc Khanh Nguyen, Nicolas Rolin, Serge Vaudenay
USENIX Security 2024
RWPQC 2023 (Lightning talk)
[preprint] [rwpqc slides]
- WhatsUpp with Sender Keys? Analysis, Improvements and Security Proofs
David Balbás, Daniel Collins, Phillip Gajland
ASIACRYPT 2023
Poster at USENIX Security 2023
CAW 2024 (affiliated with EUROCRYPT 2024)
[preprint]
[poster]
[preliminary version] (Best Paper Runner-Up at RECSI 2022)
- Network-Agnostic Security Comes (Almost) for Free in DKG and MPC
Renas Bacho, Daniel Collins, Chen-Da Liu-Zhang, Julian Loss
CRYPTO 2023
[preprint]
[talk]
[slides]
- On Active Attack Detection in Messaging with Immediate Decryption
Khashayar Barooti, Daniel Collins, Simone Colombo, Loïs Huguenin-Dumittan, Serge Vaudenay
CRYPTO 2023
Talk at NYU Crypto Reading Group
16 August 2023
[preprint]
[talk]
[crypto slides] [nyu slides]
- Cryptographic Administration for Secure Group Messaging
David Balbás, Daniel Collins, Serge Vaudenay
USENIX Security 2023
Swiss Crypto Day 2023
[preprint] [scd slides]
- Near Collision Attack Against Grain v1
Subhadeep Banik, Daniel Collins, Willi Meier
ACNS 2023
[preprint]
- A Small GIFT-COFB: Lightweight Bit-Serial Architectures
Andrea Caforio, Daniel Collins, Subhadeep Banik, Francesco Regazzoni
AFRICACRYPT 2022
[preprint]
- Optimal Symmetric Ratcheting for Secure Communication
Hailun Yan, Serge Vaudenay, Daniel Collins, Andrea Caforio
The Computer Journal (2022)
- Improving First-Order Threshold Implementations of SKINNY
Andrea Caforio, Daniel Collins, Ognjen Glamocanin, Subhadeep Banik
INDOCRYPT 2021
[preprint]
- Online Payments by Merely Broadcasting Messages
Daniel Collins, Rachid Guerraoui, Jovan Komatovic, Petr Kuznetsov, Matteo Monti, Matej Pavlovic, Yvonne-Anne Pignolet, Dragos-Adrian Seredinschi, Andrei Tonkikh, Athanasios Xygkis
DSN 2020 (Best Paper Runner-Up)
[preprint]
- Anonymity Preserving Byzantine Vector Consensus
Christian Cachin, Daniel Collins, Tyler Crain, Vincent Gramoli
ESORICS 2020
[preprint]
[talk]
Program Committee/Editorial Board:
- CCS 2025
- CIC 2025
- PKC 2025
- ACNS 2025
- Africacrypt 2024
PhD Thesis:
Selected research visits:
Where I can be found: