Research

Since 2022, my research focus is privacy-enhancing technologies, notably trusted execution environments and distributed ledgers (blockchains).

From 2016 to 2022, I worked on privacy in large-scale systems: end-to-end encryption, access control, trusted execution environments, key management, anonymity, and revocation. My PhD thesis (2019) on cryptographic access control for remote storage is available here: thesis link.

Between 2014 and 2016, I focused on machine learning and hybrid classifiers, mixing statistical inference with symbolic logic — see an example applied to remote sensing: pdf.

Bio

I have been in the software industry since 2006. I am currently Director of Technical Intelligence at Input Output, the blockchain research and engineering company behind Cardano. Previously, I was Chief Operating Officer at Parsec, the French end-to-end encrypted cloud storage. Before that, I held engineering roles with Microsoft and the United Nations. I remain a hands-on coder, switching easily between research, leadership, and code.

Publications (only top conferences included)

Stefan Contiu, Laurent Réveillère, Etienne Rivière: Practical Active Revocation, in Middleware 2020. [pdf] [video]

Simon Da Silva, Sonia Ben Mokhtar, Stefan Contiu, Daniel Négru, Laurent Réveillère, Etienne Rivière: Privatube: Privacy-preserving edge-assisted video streaming, in Middleware 2019. [pdf]

Stefan Contiu, Sébastien Vaucher, Rafael Pires, Marcelo Pasin, Pascal Felber, Laurent Réveillère: Anonymous and confidential file sharing over untrusted clouds, in SRDS 2019. [pdf]

Stefan Contiu, Rafael Pires, Sébastien Vaucher, Marcelo Pasin, Pascal Felber, Laurent Réveillère: IBBE-SGX: Cryptographic Group Access Control using Trusted Execution Environments, in DSN 2018. [pdf]

More on Google Scholar