Publications by Carmela González Troncoso

Reimagining Wearable-Based Digital Contact Tracing: Insights from Kenya and Côte d’Ivoire

While digital contact tracing has been extensively studied in Western contexts, its relevance and application in Africa remain largely unexplored. This study focuses on Kenya and Côte d’Ivoire to uncover user perceptions and inform the design of culturally ...

ACM2025

A Low-Cost Privacy-Preserving Digital Wallet for Humanitarian Aid Distribution

Carmela González Troncoso

Humanitarian organizations distribute aid to people affected by armed conflicts or natural disasters. Digitalization has the potential to increase the efficiency and fairness of aid-distribution systems, and recent work by Wang et al. has shown that these ...

IEEE2025

Designing for data protection

Carmela González Troncoso

Humanitarian Organizations assist the most vulnerable populations in extremely challenging circumstances. For reasons of efficiency, accountability, and out of a desire to help as many people as possible, Humanitarian Organizations increasingly rely on dig ...

Cambridge University Press2024

Bugs in our pockets: the risks of client-side scanning

Carmela González Troncoso

Our increasing reliance on digital technology for personal, economic, and government affairs has made it essential to secure the communications and devices of private citizens, businesses, and governments. This has led to pervasive use of cryptography acro ...

Oxford Univ Press2024

Universal Neural-Cracking-Machines: Self-Configurable Password Models from Auxiliary Data

Carmela González Troncoso, Dario Pasquini

We introduce the concept of "universal"password model - a password model that, once pre-trained, can automatically adapt its guessing strategy based on the target system. To achieve this, the model does not need to access any plaintext passwords from the t ...

Institute of Electrical and Electronics Engineers Inc.2024

VERITAS: Plaintext Encoders for Practical Verifiable Homomorphic Encryption

Jean-Pierre Hubaux, Carmela González Troncoso, Christian Louis Knabenhans

Homomorphic encryption has become a practical solution for protecting the privacy of computations on sensitive data. However, existing homomorphic encryption pipelines do not guarantee the correctness of the computation result in the presence of a maliciou ...

Association for Computing Machinery, Inc2024

Helium: Scalable MPC among Lightweight Participants and under Churn

Carmela González Troncoso

We introduce Helium, a novel framework that supports scalable secure multiparty computation (MPC) for lightweight participants and tolerates churn. Helium relies on multiparty homomorphic encryption (MHE) as its core building block. While MHE schemes have ...

Association for Computing Machinery, Inc2024

Neural Exec: Learning (and Learning from) Execution Triggers for Prompt Injection Attacks

Carmela González Troncoso

We introduce a new family of prompt injection attacks, termed Neural Exec. Unlike known attacks that rely on handcrafted strings (e.g., Ignore previous instructions and...), we show that it is possible to conceptualize the creation of execution triggers as ...

Association for Computing Machinery2024

Janus: Safe Biometric Deduplication for Humanitarian Aid Distribution

Carmela González Troncoso, Kasra Edalatnejadkhamene

Humanitarian organizations provide aid to people in need. To use their limited budget efficiently, their distribution processes must ensure that legitimate recipients cannot receive more aid than they are entitled to. Thus, it is essential that recipients ...

Institute of Electrical and Electronics Engineers Inc.2024

PELTA - Shielding Multiparty-FHE against Malicious Adversaries

Jean-Pierre Hubaux, Carmela González Troncoso, Sylvain Chatel, Christian Vincent Mouchet

Multiparty fully homomorphic encryption (MFHE) schemes enable multiple parties to efficiently compute functions on their sensitive data while retaining confidentiality. However, existing MFHE schemes guarantee data confidentiality and the correctness of th ...

Assoc Computing Machinery2023