• Anupama P.L.
• Anver S.R.

Cloud computing provides data storage mechanism to access the data anywhere and anytime. Storing the personal data in the cloud causes the problem of confidentiality. The user does not get any idea about where the data resides. In most cases the vital and secret information are in the hands of untrusted third parties i.e., the cloud providers. Encryption is one of the methods available for providing confidentiality. But if anyone gets that key he can decrypt all the data. Here we propose a novel scheme that integrates the encryption of the critical data with user access control mechanisms with multiple decryption keys. The scheme guarantees the confidentiality of the data in the public cloud and the possibility of performing independent and concurrent access of encrypted cloud database. Here both encrypted data and the encrypted metadata are kept in the cloud. The latter can be decrypted only by authorized clients. Encrypted data is then accessed and the plain text is obtained through queries. This scheme also reduces the risk of internal data leakage.

Cloud, Security, Confidentiality, Secure File Access mechanism

"Supporting Confidentiality in Cloud Databases and Role Based Access", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 12, page no.646-651, December-2015, Available :http://www.jetir.org/papers/JETIR1701A92.pdf

"Supporting Confidentiality in Cloud Databases and Role Based Access", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 12, page no. pp646-651, December-2015, Available at : http://www.jetir.org/papers/JETIR1701A92.pdf