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    HIDENETS: HIghly DEpendable ip-based NETworks and Services (2006-2009)

    April 2nd, 2009

    From Jan 2006 until March 2009, I was involved in the HIDENETS project, supported by the European Commission.

    INForum 2009

    March 28th, 2009

    INForum 2009Computer and Communications Security Track, Sep 10-11, 2009.

    Summary (in portuguese):

    O INForum tem como objectivo ser um evento privilegiado de reunião da comunidade nacional nas diversas vertentes da informática e ambiciona ser o fórum de eleição para a divulgação, discussão e reconhecimento de trabalhos científicos. O INForum surge com particular oportunidade como palco para a estreia de jovens investigadores que buscam a divulgação, a crítica construtiva e o encorajamento ao seu trabalho.

    O 1º INForum pretende ser abrangente e dinâmico no conjunto de tópicos abordados. Apresentará um conjunto de tópicos propostos e seleccionados anualmente, com sessões organizadas e realizadas de forma independente. Promove-se assim a massa crítica para o fortalecimento e evolução da informática no país criando-se, simultaneamente, espaço à evolução do contexto da conferência e fomentando a reunião de investigadores em áreas emergentes.

    O 1º INForum decorrerá nos dias 10 e 11 de Setembro de 2009 na Faculdade de Ciências da Universidade de Lisboa.

    DSN 2009 Fast Abstracts

    February 28th, 2009

    DSN 2009: 39th Annual IEEE/IFIP International Conference on Dependable Systems and Networks, June 29 – July 2, 2009.


    DSN is the chosen forum for researchers around the world, for presenting the very best research results, solutions to problems, and insight into emergent new challenges. DSN has pioneered the fusion between security and dependability, understanding the need to simultaneously fight against cyber attacks, accidental faults, design errors, and unexpected operating conditions.

    JBP – Java Byzantine Paxos

    December 18th, 2008

    JBP aims to provide a complete, modular and clear implementation of the Byzantine Paxos agreement protocol in Java programming language. Since there are several variants of this algorithm, we choose to implement Paxos at War, by Piotr Zielinski, for consensus and extended it to for total order multicast adding only one communication step and maintaining the quadratic message complexity using the usual technique proposed by Leslie Lamport in the Classical Paxos algorithm and later extended by Castro and Liskov in the BFT system.

    JBP was developed because there was no implementation of a fast Byzantine fault-tolerant Total order multicast protocol in Java. Moreover, JBP implementation follow the same line of the BFT system (implemented in C), but we want to separate state management (basically, checkpoints) from the core total order multicast algorithm.

    JBP is available to download, you are welcome to try it!

    EDCC-7 Student Forum

    March 19th, 2008

    EDCC-7: 7th European Dependable Computing Conference, May 7-9, 2008.


    There is an increasing dependency of the society on computing services and their underlying computing systems. This dependency creates strict requirements for the delivered services. These requirements affect to the quality of service, continuous availability, survivability in the advent of catastrophic failures, confidentiality, intrusion tolerance, etc. Dependability is a concept that considers all these cross-cutting concerns and required attributes, such as reliability, availability, safety, and security, as well as human factors.

    The 7th European Dependable Computing Conference aims at providing a European-hosted venue for researchers and practioners from all over the world to present and discuss their latest research achievements. Original papers are solicited on theory, techniques, systems, and tools for the design, validation, operation and evaluation of dependable computing systems. All kinds of faults are of interest, from traditional hardware and software faults to accidental and malicious human interactions.

    Concretização de um cenário de carros cooperantes num ambiente móvel sem fios

    September 30th, 2003

    Concretização de um cenário de carros cooperantes num ambiente móvel sem fios [paper in portuguese]
    Paulo Sousa, Pedro Martins, António Casimiro, Paulo Veríssimo
    In Actas da Sexta Conferência sobre Redes de Computadores (CRC’03), Bragança, Portugal, Set 2003.

    Towards a Cooperating Autonomous Car

    October 2nd, 2002

    Towards a Cooperating Autonomous Car [paper]
    Paulo Sousa, Paulo Veríssimo
    In Proceedings of the 7th CaberNet Radicals Workshop, Bertinoro, Italy, Oct 2002.