### Private Lives Matter: A Differential Private Functional Encryption Scheme (extended version)

Alexandtros Bakas, Antonis Michalas, and Tassos Dimitriou

##### Abstract

The use of data combined with tailored statistical analysis have presented a unique opportunity to organizations in diverse fields to observe users' behaviors and needs, and accordingly adapt and fine-tune their services. However, in order to offer utilizable, plausible, and personalized alternatives to users, this process usually also entails a breach of their privacy. The use of statistical databases for releasing data analytics is growing exponentially, and while many cryptographic methods are utilized to protect the confidentiality of the data -- a task that has been ably carried out by many authors over the years -- only a few %rudimentary number of works focus on the problem of privatizing the actual databases. Believing that securing and privatizing databases are two equilateral problems, in this paper, we propose a hybrid approach by combining Functional Encryption with the principles of Differential Privacy. Our main goal is not only to design a scheme for processing statistical data and releasing statistics in a privacy-preserving way but also to provide a richer, more balanced, and comprehensive approach in which data analytics and cryptography go hand in hand with a shift towards increased privacy.

Available format(s)
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
Differential PrivacyFunctional EncryptionMulti-Input Functional EncryptionMulti-Party Computation
Contact author(s)
alexandros bakas @ tuni fi
History
Short URL
https://ia.cr/2021/1692

CC BY

BibTeX

@misc{cryptoeprint:2021/1692,
author = {Alexandtros Bakas and Antonis Michalas and Tassos Dimitriou},
title = {Private Lives Matter: A Differential Private Functional Encryption Scheme (extended version)},
howpublished = {Cryptology ePrint Archive, Paper 2021/1692},
year = {2021},
note = {\url{https://eprint.iacr.org/2021/1692}},
url = {https://eprint.iacr.org/2021/1692}
}

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