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Title: Report on Encryption-based Policy Enforcement and Controlled Query Execution

Citation Type: Miscellaneous

Publication Year: 2021

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Abstract: This deliverable describes the techniques developed in WP4 for protecting data and computations in the digital data market. In particular, the document focuses on the techniques developed for supporting controlled data sharing for collaborative queries and fine-grained data retrieval. The model and techniques described enable the involvement of the data market in the execution of queries over data stored either in plaintext or encrypted form, possibly delegating parts of the execution to external parties when economically convenient while fully respecting the security policies associated with data. During the query execution, data can be dynamically wrapped and unwrapped to regulate visibility over them. Fine-grained data retrieval is instead supported through the definition of a multi-dimensional index that is robust against inference exposure and supports the efficient execution of point and range queries over encrypted data. The experimental evaluation over a dataset with 3.2M data items shows that the multi-dimensional index performs well for query execution and requires limited storage at the client-side.

Url: https://mosaicrown.eu/wp-content/uploads/2021/11/D4.4.pdf

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Authors: De Capitani di Vimercati, Sabrina; Foresti, Sara; Livraga, Giovanni; Paraboschi, Stefano; Samarati, Pierangela; Facchinetti, Dario; Oldani, Gianluca; Rossi, Matthew

Publisher: Università degli Studi di Bergamo, Università degli Studi di Milano

Data Collections: IPUMS USA

Topics: Methodology and Data Collection

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