Frederico Miguel Reis Sabino

Unobservable Covert Streaming for Internet Censorship Circumvention

Tese submetida para provas de mestrado em Engenharia Informática e de Computadores Instituto Superior Técnico, Universidade de Lisboa.


Previous systems that support the dynamic adaptation of Byzantine Fault Tolerant (BFT) protocols have important limitations such as: lack of robustness (dependence on central and trustworthy components); low flexibility (constraining the adaptation strategies); and lack of extensibility (making it impossible to add new policies). To overcome these gaps, this dissertation proposes a generic BFT adaptation manager which can be used to execute different adaptation policies. This manager is independent of the target service which needs to be adapted dynamically and is, by itself, also tolerant to Byzantine Faults. The manager has been implemented using BFT-SMaRt, a well known open-source library. The experimental evaluation of the resulting prototype illustrates that it can be used to effectively increase the performance of a target BFT service in different operational conditions.


ByTAM: a Byzantine Fault Tolerant Adaptation Manager
Frederico Miguel Reis Sabino
MSc Thesis. Instituto Superior Técnico, Universidade de Lisboa.
September, 2016.
Available BibTeX, MSC Thesis, and extended abstract, and mid-term report.
ByTAM: um gestor de adaptação tolerante a falhas Bizantinas.
F. Sabino, D. Porto e L. Rodrigues
Actas do oitavo Simpósio de Informática (Inforum), Lisboa, Portugal, Sep. 2016.
Available BibTeX, extended report (pdf).

Luís Rodrigues