A problem with organizations for shifting their storage to cloud or remote server is maintenance of confidentiality, integrity and availability of outsourced data,especially if the remote server is not trusted. Encryption can be used as a solution to these security concerns. But it should be possible for the data owner and other authenticated users of the data to perform queries (especially statistical queries) over data in encrypted domain. Usage of symmetric encryption will create another security concerns like management of key, denying a user from querying data etc. The problem with asymmetric encryption technique is only owner of the data is allowed to decrypt the data with his private key.
Greeshma Sarath and Jayapriya, R., “Securing Database Server Using Homomorphic Encryption and Re-encryption”, in 3rd International Symposium on Security in Computing and Communications, SSCC 2015, Cham, 2015.