Analysis of Security Techniques Applied in Database Outsourcing

Database Outsourcing is a nascent data management paradigm in which the data owner stores the confidential data at the third party service provider’s site. The service provider is responsible for managing and administering the database and allows the data owner and clients to create, update, delete and access the database. There are chances of hampering the security of the data due to untrustworthiness of service provider. So, to secure the data which is outsourced to third party is a great challenge. The major requirements for achieving security in outsourced databases are confidentiality, privacy, integrity, freshness in case of dynamic updates, access control in multi-user environment, availability and query authentication and assurance. To achieve these requirements various security mechanisms like encryption based approach, fake tuple based approach, customized secret sharing approach, authenticated data structure approach, aggregate-able signature schemes have been put forth till date. In this paper, various mechanisms for implementing security in outsourced databases are analyzed along with their usefulness in a great detail. Keywords— Access Control, Confidentiality, Freshness, Integrity, Outsourced Databases, Query Authentication,