RT Journal Article T1 Privacy-enhancing distributed protocol for data aggregation based on blockchain and homomorphic encryption A1 Regueiro, Cristina A1 Seco, Iñaki A1 de Diego, Santiago A1 Lage, Oscar A1 Etxebarria, Leire AB The recent increase in reported incidents of security breaches compromising users' privacy call into question the current centralized model in which third-parties collect and control massive amounts of personal data. Blockchain has demonstrated that trusted and auditable computing is possible using a decentralized network of peers accompanied by a public ledger. Furthermore, Homomorphic Encryption (HE) guarantees confidentiality not only on the computation but also on the transmission, and storage processes. The synergy between Blockchain and HE is rapidly increasing in the computing environment. This research proposes a privacy-enhancing distributed and secure protocol for data aggregation backboned by Blockchain and HE technologies. Blockchain acts as a distributed ledger which facilitates efficient data aggregation through a Smart Contract. On the top, HE will be used for data encryption allowing private aggregation operations. The theoretical description, potential applications, a suggested implementation and a performance analysis are presented to validate the proposed solution. SN 1873-5371 YR 2021 FD 2021-11 LA eng NO Regueiro , C , Seco , I , de Diego , S , Lage , O & Etxebarria , L 2021 , ' Privacy-enhancing distributed protocol for data aggregation based on blockchain and homomorphic encryption ' , Information Processing & Management , vol. 58 , no. 6 , 102745 , pp. 102745 . https://doi.org/10.1016/j.ipm.2021.102745 NO Publisher Copyright: © 2021 DS TECNALIA Publications RD 3 jul 2024