Rodrigo de Magalhães Marques dos Santos Silva
Deduplication vs Privacy Tradeoffs in Cloud Storage
Tese submetida para provas de mestrado em Engenharia
Informática e de Computadores Instituto Superior
Técnico, Universidade de Lisboa.
Abstract
To ensure the privacy of their data when stored in the cloud, users can choose to encrypt files before exporting them. Unfortunately, without additional mechanisms, encrypted data storage makes it impossi- ble to implement server-side deduplication techniques, as two identical files will have different encrypted versions. In this thesis, we address the problem of reconciling the need to encrypt data with the ad- vantages of deduplication. In particular, we study techniques that achieve this objective while avoiding frequency analysis attacks (an attack that allows an adversary to infer the content of an encrypted file based on how frequently the file is stored and/or accessed). We propose a new protocol to assign en- cryption keys to files that leverages the use of trusted execution environments to hide the frequency of a file from the adversary.
Publicações
- Deduplication vs Privacy Tradeoffs in Cloud Storage
- Rodrigo de Magalhães Marques dos Santos Silva
- MSc Thesis. Instituto Superior Técnico,
Universidade de Lisboa.
- November 2022.
- Available BibTeX, MSC Thesis, and extended abstract, and
mid-term
report.
- Ataques de Frequência em
Deduplicação Cifrada na Nuvem.
-
R. Silva, C. Correia, M. Correia and L. Rodrigues.
- Actas do
décimo segundo Simpósio de Informática
(Inforum), Guarda, Portugal, Sep. 2022.
-
- Available BibTeX, extended report (pdf).
- Deduplication vs Privacy Tradeoffs in Cloud
Storage
- R. Silva, C. Correia, M. Correia and L.
Rodrigues.
- Proceedings of the The 38th ACM/SIGAPP Symposium On
Applied Computing (SAC), Tallinn Estonia, March 2023.
Luís Rodrigues