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About

About

My name is Tânia Esteves, and I am a Ph.D. student at HASLab / INESC TEC. I completed my integrated master's degree in Informatics Engineering in 2018 at the University of Minho, and I have joined HASLab during the development of my master thesis named “Secure and Configurable Storage Systems.” Currently, I am attending the Doctoral Program in Informatics (PDINF) at the University of Minho, and my main research interests are focused on security and distributed systems.

Interest
Topics
Details

Details

  • Name

    Tânia Conceição Araújo
  • Cluster

    Computer Science
  • Role

    Research Assistant
  • Since

    01st April 2018
001
Publications

2021

S2Dedup: SGX-enabled secure deduplication

Authors
Miranda, M; Esteves, T; Portela, B; Paulo, J;

Publication
SYSTOR '21: The 14th ACM International Systems and Storage Conference, Haifa, Israel, June 14-16, 2021.

Abstract
Secure deduplication allows removing duplicate content at third-party storage services while preserving the privacy of users' data. However, current solutions are built with strict designs that cannot be adapted to storage service and applications with different security and performance requirements. We present S2Dedup, a trusted hardware-based privacy-preserving deduplication system designed to support multiple security schemes that enable different levels of performance, security guarantees and space savings. An in-depth evaluation shows these trade-offs for the distinct Intel SGX-based secure schemes supported by our prototype. Moreover, we propose a novel Epoch and Exact Frequency scheme that prevents frequency analysis leakage attacks present in current deterministic approaches for secure deduplication while maintaining similar performance and space savings to state-of-the-art approaches.

2021

CAT: content-aware tracing and analysis for distributed systems

Authors
Esteves, T; Neves, F; Oliveira, R; Paulo, J;

Publication
Middleware '21: 22nd International Middleware Conference, Québec City, Canada, December 6 - 10, 2021

Abstract

2019

TRUSTFS: An SGX-enabled Stackable File System Framework

Authors
Esteves, T; Macedo, R; Faria, A; Portela, B; Paulo, J; Pereira, J; Harnik, D;

Publication
2019 38TH INTERNATIONAL SYMPOSIUM ON RELIABLE DISTRIBUTED SYSTEMS WORKSHOPS (SRDSW 2019)

Abstract
Data confidentiality in cloud services is commonly ensured by encrypting information before uploading it. However, this approach limits the use of content-aware functionalities, such as deduplication and compression. Although this issue has been addressed individually for some of these functionalities, no unified framework for building secure storage systems exists that can leverage such operations over encrypted data. We present TRUSTFS, a programmable and modular stackable file system framework for implementing secure content-aware storage functionalities over hardware-assisted trusted execution environments. This framework extends the original SAFEFS architecture to provide the isolated execution guarantees of Intel SGX. We demonstrate its usability by implementing an SGX-enabled stackable file system prototype while a preliminary evaluation shows that it incurs reasonable performance overhead when compared to conventional storage systems. Finally, we highlight open research challenges that must be further pursued in order for TRUSTFS to be fully adequate for building production-ready secure storage solutions.