Highly Efficient Indexing for Privacy-Preserving Multi-keyword Query over Encrypted Cloud Data

Privacy-Preserving Protocol in Multi-User Cloud

“…Encryption provides privacy and confidentiality, and avoid any data revealing by semi-trusted CSP or other users and outsiders [16]. Considering the real world scenarios where each data owner (personal or business data owner), encrypts his data with his key, as a result, outsourced data are encrypted with different keys, which makes impossible to compute over encrypted data [4].…”

“…Additionally, the CSP could bypass access control to gain access to the stored data [1], which compromises data privacy. A Naive solution is to share a secret key among all users, which is not desirable because the most real world scenarios are non-interactive [4]. The approaches like Lopez et al [12] are impractical while they need to execute a light multi party computation to decrypt the results.…”