In today's world security becomes valuable and necessary asset for many applications, so security becomes critical. Bank information, medical research database all this information can be dangerous if it fail into wrong hands. Privacy of this invaluable asset needs to be protected. However, privacy is not only the issue. Data confidentiality is also concern to all the problems regarding database. Although privacy and confidentiality both are different concept. Privacy relates to person whereas confidentiality relates to data. So problem arises at this point where database needs to be updated.