Publications de Simone Maria Stefano Colombo

Beyond the ratchet: practical challenges in secure messaging

Secure messaging systems are essential for ensuring privacy and confidentiality in today's digital communication. Thanks to the widespread adoption of end-to-end encryption, messages are accessible only to intended users, and advancements in protocol resil ...

EPFL2025

E-Vote Your Conscience: Perceptions of Coercion and Vote Buying, and the Usability of Fake Credentials in Online Voting

Bryan Alexander Ford, Verónica del Carmen Estrada Galiñanes, Louis-Henri Manuel Jakob Merino, Simone Maria Stefano Colombo, Haoqian Zhang

Online voting is attractive for convenience and accessibility, but is more susceptible to voter coercion and vote buying than in-person voting. One mitigation is to give voters fake voting credentials that they can yield to a coercer. Fake credentials appe ...

IEEE2024

On Active Attack Detection in Messaging with Immediate Decryption

Serge Vaudenay, Loïs Evan Huguenin-Dumittan, Daniel Patrick Collins, Simone Maria Stefano Colombo, Khashayar Barooti

Springer2023

Authenticated private information retrieval

Bryan Alexander Ford, Simone Maria Stefano Colombo, Henry Nathaniel Corrigan-Gibbs, Kirill Nikitin

This paper introduces protocols for authenticated private information retrieval. These schemes enable a client to fetch a record from a remote database server such that (a) the server does not learn which record the client reads, and (b) the client either ...

Usenix Assoc2023