Generating Privacy-Preserved Recommendation Using Homomorphic Authenticated Encryption

Abstract

Online service providers started to providepersonalized recommendation to the users by collecting userprivate sensitive data. Traditionally the user private data isencrypted using a symmetric encryption algorithm beforestoring it in the cloud to provide another layer of security fordata at rest. It makes users' data secure from third parties, butnot the service provider. We propose a method that generatesrecommendations using homomorphically encrypted data in aprivacy preserved manner to provide protection against serviceprovider. We also verify the correctness of computations doneby a third parties and the service provider over encrypteddata using homomorphic authenticators and some securecryptographic protocols. © 2016 IEEE.