A Web Application for Secure Data Collaboration

Suppose that multiple entities would like to store their data in a common database in a way that each entity can run certain queries on the merged data set but no one can have access to other entities’ data. Secure data collaboration is becoming more and more desirable in modern enterprises. It ensures the integrity, confidentiality, and privacy of shared information, essential for effective collaboration. In this paper, we will give a detailed technical description of a web application that enables users to perform such queries. We use two different methods to ensure data privacy: anonymization and pseudonymization. For anonymization, we introduce a cryptographic protocol that necessitates the collaboration of multiple participants. In addition, we use Fully Homomorphic Encryption (FHE) for pseudonymization.