In many applications privacy becomes big issue as database size increases. For example, hospital or bank needs to share personal information of individuals in such a way that identities of the individuals cannot be revealed. In that case, personal identifier is removed to protect private or personal information is called anonymization.There are different data anonymization techniques. But in this paper k-anonymization approach is used. Suppose Alice having his own k-anonymous database and Bob wants to insert a tuple.So,the problem is to check after inserting a tuple whether database retains its k-anonymity or not. If allowing Alice to read content of tuple directly, it breaks the privacy of Bob and on the other hand database confidentiality violated once Bob has access to the contents of the database. In this paper, we propose a protocol to solve this problem on Generalization-based k-anonymous and confidential databases.
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