Cloud computing has been emerged as a pla tform for exchange of the data in a multicast communication and to store the data over a period. Particularly in the case of medical data which may be sensitive information, the privacy of data is a primary concern. If left unprotected these could bring forward grave consequences on privacy. The common solution is to encrypt the data before placing it in the cloud. Some prominent risks include key management, user revocation and freshness of data. Here the data were encrypted and stored in cloud to get the benefits of the cloud while key for encryption is stored at the client side. The data are stored in the cloud till its retention period is getting over. For the effective computation of encrypting the data and to check the retention period of data that were stored in the cloud a Hadoop frame work is used.
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