Gloria Mainar-Ruiz

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Cloud services are rapidly gaining adoption due to the promises of cost efficiency, availability, and on-demand scaling. To achieve these promises, cloud providers share physical resources to support multi-tenancy of cloud platforms. However, the possibility of sharing the same hardware with potential attackers makes users reluctant to off-load sensitive(More)
—We present VC3, the first system that allows users to run distributed MapReduce computations in the cloud while keeping their code and data secret, and ensuring the correctness and completeness of their results. VC3 runs on unmodified Hadoop, but crucially keeps Hadoop, the operating system and the hypervisor out of the TCB; thus, confidentiality and(More)
In this work, a fast approximate nearest neighbour search algorithm using single Space-filling Curve (SPFC) Mapping and a set of synthetic prototype representations is presented. The results are comparable to a multiple-spacefilling scheme, but achieving a much faster execution time, since computing multiple transformations and SPFC Mapping's is avoided, at(More)
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