André F. Alves

University of Lisbon

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Liliana P. Ferreira

University of Coimbra

M.M. Cruz

University of Lisbon

M. Godinho

University of Lisbon

Maria Deus Carvalho

Faculdade de Ciências Médicas de Minas Gerais

Sofia G. Mendo

University of Lisbon

Paula Ferreira

University of Aveiro

M.H. Mendonça

University of Lisbon

Mona Lisa Moura de Oliveira

Universidade Estadual do Ceará

Susana Carla Farias Pereira

Fundação Getulio Vargas

João R. C. Ramos

Rede de Química e Tecnologia

Cooperative Institutions

University of Lisbon

Instituto Politécnico de Lisboa

Faculdade de Tecnologia e Ciências

Rede de Química e Tecnologia

Instituto Superior Técnico

University of Aveiro

Lusíada University of Lisbon

Universidade Nova de Lisboa

Institute of Physics

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento

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Enhanced magnetic hyperthermia of CoFe2O4 and MnFe2O4 nanoparticles

Journal of Alloys and Compounds (2017)

M.M. Cruz Liliana P. Ferreira João R. C. Ramos Sofia G. Mendo André F. Alves

Magnetic hyperthermia

Aqueous suspension

Suspension

10.1016/j.jallcom.2017.01.297

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Citations (77)

Gelatine-assisted synthesis of magnetite nanoparticles for magnetic hyperthermia

Journal of Nanoparticle Research (2016)

André F. Alves Sofia G. Mendo Liliana P. Ferreira M.H. Mendonça Paula Ferreira

Magnetic hyperthermia

10.1007/s11051-016-3327-z

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Citations (28)

Storekeeper: A Security-Enhanced Cloud Storage Aggregation Service

Pereira Sancha André F. Alves Nuno Santos Ricardo Chaves

Cloud storage services are currently a commodity that allows users to store data persistently, access the data from everywhere, and share it with friends or co-workers. However, due to the proliferation of cloud storage accounts and lack of interoperability between cloud services, managing and sharing cloud-hosted files is a nightmare for many users. To address this problem, specialized cloud aggregator systems emerged that provide users a global view of all files in their accounts and enable file sharing between users from different clouds. Such systems, however, have limited security: not only they fail to provide end-to-end privacy from cloud providers, but they require users to grant full access privileges to individual cloud storage accounts. In this paper, we present Storekeeper, a privacy-preserving cloud aggregation service that enables file sharing on multi-user multi-cloud storage platforms while preserving data confidentiality from cloud providers and from the cloud aggregator service. To provide this property, Storekeeper decentralizes most of the cloud aggregation logic to the client side enabling security sensitive functions to be performed only on the trusted client endpoints. This decentralization brings new challenges related with file update propagation, access control, user authentication, and key management that are addressed by Storekeeper. This is provided at a low cost (7% on average) when compared with the underlining cloud providers.

Cloud storage

10.1109/srds.2016.023

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Citations (7)

CoFe₂O₄ nanoparticles synthesized with natural templates

RSC Advances (2016)

Liliana P. Ferreira M.M. Cruz Mona Lisa Moura de Oliveira Sofia G. Mendo André F. Alves

CoFe₂O₄ nanoparticles with high magnetic coercivity were synthesized using natural templates.

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10.1039/c6ra13818g

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Citations (10)