Date Added: Apr 2013
The data owners directly read the contents of the database simply it breaks the privacy of the user's data. If the users access the database content directly then the confidentiality of the data owners has been violated. So both privacy and confidentiality of the database are considered to be a major problem. In the existing system the privacy information gets lost in large amount and does not provide any security mechanism. It is impossible to consider every possible inference and also drastically reduces the quality of the data.