Interscience Open Access Journals
Sometimes sensitive data must be handed over to supposedly trust third parties. With the extensive application of database systems, the owners of the databases have urgent requirements to protect their copyright of databases. Some of the data is leaked and found in an unauthorized place the distributor must assess the likelihood that the leaked data came from one or more users. This paper contains concept of data leakage, its causes of leakage and different techniques to protect and detect the data leakage. In the field of IT huge database is being used.