TCLOUDS: Trustworthy Clouds: Privacy and Resilience for Internet-scale Critical Infrastructure

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  • Research Line(s): Fault and Intrusion Tolerance in Open Distributed Systems (FIT)
  • Sponsor: EU (FP7-ICT Integrated project)
  • Project Number: 257243
  • Total award amount: 7.5M Euros
  • Coordinator: Technikon Forschungs- und Planungsgesellschaft
  • Partners: Technikon, IBM Research GmbH, Philips Electronics Nederland B.V., Sirrix AG, FCUL, ULD, University of Oxford, Politecnico di Torino, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fondazione Centro San Raffaele Del Monte Tabor, EDP, UNU MERIT (University of Maastricht), EFACEC, TU Darmstadt
  • Start Date: Oct. 2010
  • Duration: 36 months
  • Team at FCUL: Researchers including Alysson Bessani


Trustworthy Clouds (TClouds) aims to build a prototype Internetscale ICT infrastructure which allows virtualized computing, network, and storage resources over the Internet to provide scalability and cost-efficiency. The following objectives contribute to achieving the overall goal:

  • Identifying and addressing the legal and business implications and opportunities of a widespread use of infrastructure clouds, contributing to building a regulatory framework for enabling resilient and privacy-enhanced cross-border infrastructure clouds.
  • Defining an architecture and prototype for securing infrastructure clouds by providing security enhancements that can be deployed on top of commodity infrastructure clouds (as a cloudof-clouds) and assessing the resilience and privacy benefits of security extensions of existing clouds.
  • Providing resilient middleware for adaptive security on the cloud-of-clouds. The TClouds platform will provide tolerance and adaptability to mitigate security incidents and unstable operating conditions for a range of applications running on such clouds-of-clouds.

To demonstrate TClouds, scientists will prototype two scenarios involving critical IT- systems:

  • A smart energy grid with Portugal’s leading energy and solution providers Energias de Portugal and EFACEC: TClouds will show how such energy-preserving systems can be migrated to a cloud infrastructure while increasing their resilience, privacy protection and tolerance against both hackers and hardware failures.
  • A patient-centric home healthcare service with San Raffaele Hospital in Milano, Italy, will remotely monitor, diagnose and assist patients outside a hospital setting. TClouds will demonstrate how the quality of in-home healthcare can be improved cost-efficiently without reducing privacy.


  • Alysson Bessani, Ricardo Mendes, Tiago Oliveira, Nuno Ferreira Neves, Miguel Correia, Marcelo Pasin, Paulo Verissimo, “SCFS: A Shared Cloud-backed File System”, in Proceedings of the 2014 USENIX Annual Technical Conference (USENIX-ATC), Philadelphia, PA, US, Jun. 2014.

  • Vinicius Vielmo Cogo, André Nogueira, João Sousa, Marcelo Pasin, Hans P. Reiser, Alysson Bessani, “FITCH: Supporting Adaptive Replicated Services in the Cloud”, in Proceedings of the 13th IFIP International Conference on Distributed Applications and Interoperable Systems (DAIS'13), Jim Dowling, Francois Taïani, Eds., Florence, Italy, Jun. 2013, pp. 15–28.


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