Cloud-based Private Querying of Databases by Means of Homomorphic Encryption

• DOI: 10.5220/0010378801230131
• Publication Date: 2021-04-30T08:08:43Z
• Authors: Yassine Abbar; Pascal Aubry; Thierno Barry; Sergiu Carpov; Sayanta Mallick; Mariem Krichen; Damien Ligier; Sergey Shpak; Renaud Sirdey
• Keywords: Homomorphic Encryption

International audience<br/>This paper deals with several use-cases for privately querying corpora of documents in both settings wherethe corpus is public or private with respect to an honest-but-curious infrastructure executing the query. Weaddress these scenarios using Fully Homomorphic Encryption (FHE) hybridized with other techniques suchas Symmetric Searchable Encryption (SSE) and Private Information Retrieval (PIR) to achieve acceptablesystem level performances. The paper also presents the prototypes developed to validate the approach andreports on the performances obtained as well as their capacity to scale.<br/>