research

contents

• publications
• preprints
• standardisation documents
• invited talks
• program committees
• internships and research visits

publications

• Crypto Dark Matter on the Torus: Oblivious PRFs from shallow PRFs and FHE (IACR Eurocrypt 2024) Martin R. Albrecht, Alex Davidson, Amit Deo, Daniel Gardham
• FrodoPIR: Simple, Scalable, Single-Server Private Information Retrieval (PoPETS 2023, Issue 1) Alex Davidson, Gonçalo Pestana, Sofía Celi
• Tango or Square Dance? How Tightly Should we Integrate Network Functionality in Browsers? (ACM HotNets 2022) Alex Davidson, Matthias Frei, Marten Gartner, Hamed Haddadi, Jordi Subirà Nieto, Adrian Perrig, Philipp Winter, François Wirz
• STAR: Distributed Secret Sharing for Private Threshold Aggregation Reporting (ACM CCS 2022) Alex Davidson, Peter Snyder, E. B. Quirk, Joseph Genereux, Benjamin Livshits *** Distinguished Paper Award ***
• Let The Right One In: Attestation as a Usable CAPTCHA Alternative (SOUPS 2022) Tara Whalen, Thibault Meunier, Mrudula Kodali, Alex Davidson, Marwan Fayed, Armando Faz-Hernández, Watson Ladd, Deepak Maram, Nick Sullivan, Benedikt Christoph Wolters, Maxime Guerreiro, Andrew Galloni
• Round-optimal Verifiable Oblivious Pseudorandom Functions From Ideal Lattices (IACR PKC 2021) Martin R. Albrecht, Alex Davidson, Amit Deo, Nigel P. Smart
• Adaptively Secure Constrained Pseudorandom Functions in the Standard Model (CRYPTO 2020) Alex Davidson, Shuichi Katsumata, Ryo Nishimaki, Shota Yamada, Takashi Yamakawa
• Strong Post-Compromise Secure Proxy Re-Encryption (ACISP 2019) Alex Davidson, Amit Deo, Ela Lee, Keith Martin
• A Bit-fixing PRF with O(1) Collusion-resistance from LWE (EPRINT 2018) Alex Davidson, Ryo Nishimaki
• Estimate all the {LWE, NTRU} schemes! (SCN 2018) Martin R. Albrecht, Benjamin R. Curtis, Amit Deo, Alex Davidson, Rachel Player, Eamonn W. Postlethwaite, Fernando Virdia, Thomas Wunderer
• Privacy Pass: Bypassing Internet Challenges Anonymously (PETS 2018) Alex Davidson, Ian Goldberg, Nick Sullivan, George Tankersley, Filippo Valsorda *** Andreas Pfitzmann Best Student Paper Award ***
• Notes on GGH13 without ideals (IMACC 2017) Martin Albrecht, Alex Davidson, Enrique Larraia
• An Efficient Toolkit for Computing Private Set Operations (ACISP 2017), Alex Davidson and Carlos Cid
• A Model for Secure and Mutually Beneficial Software Vulnerability Sharing (WISCS@CCS16) Alex Davidson, Gregory Fenn, Carlos Cid

preprints

• Call Me By My Name: Simple, Practical Private Information Retrieval for Keyword Queries (IACR eprint 2024) Sofía Celi, Alex Davidson
• DiStefano: Decentralized Infrastructure for Sharing Trusted Encrypted Facts and Nothing More (IACR eprint 2023) Sofía Celi, Alex Davidson, Hamed Haddadi, Gonçalo Pestana, Joe Rowell
• A Framework for Building Secure, Scalable, Networked Enclaves (arxiv 2022) Philipp Winter, Ralph Giles, Alex Davidson, Gonçalo Pestana
• PrivateFetch: Scalable Catalog Delivery in Privacy-Preserving Advertising (arxiv 2021) Muhammad Haris Mughees, Gonçalo Pestana, Alex Davidson, Benjamin Livshits
• A Bit-fixing PRF with O(1) Collusion-resistance from LWE (IACR eprint 2018) Alex Davidson, Ryo Nishimaki

standardisation documents

• RFC 9497: Oblivious Pseudorandom Functions (OPRFs) using Prime-Order Groups (IRTF CFRG)
• Privacy Pass Issuance Protocol (IETF privacypass), status: WG draft
• Privacy Pass Architecture (IETF privacypass), status: WG draft
• Key Consistency and Discovery (IETF privacypass), status: WG draft
• STAR: Distributed Secret Sharing for Private Threshold Aggregation Reporting (IETF PPM), status: draft

invited talks

• Latincrypt 2023: "Private Information Retrieval"
• PQNet November 2022 Panel: "Beyond post-quantum signatures and KEMs: zero knowledge, OPRF and threshold"
• London-ish Crypto Day 2022: "STAR: Low-Cost Private Analytics for Everyone"
• IETF113 Privacy-Preserving Measurements Working Group: "STAR: Distributed Secret Sharing for Private Threshold Aggregation Reporting"
• ACAS Workshop @ IACR Crypto 2020: "Standardizing Anonymous Authorization for the Internet"
• IETF107 PrivacyPass BoF meeting: "Privacy Pass Protocol & Architecture"
• Tokyo Crypto Day 2018: "Notes On GGH13 Without The Presence Of Ideals"

program committees

• ACM CCS 2024
• PoPETS 2024
• IMACC 2023
• IMACC 2019

internships and research visits

• NTT Musashino R+D; visited Ryo Nishimaki (Feb - May 2018)
• ENS Paris; visited Pooya Farshim (Nov 2017)
• Cloudflare; crypto team (Jul - Oct 2017)
• Cloudflare; crypto team (Jun - Sep 2016)