Description

In this section we describe a new novel cryptography approaches based key management with data storage on cloud server. Once the encryption key is exposed, the only viable measure to preserve data confidentiality is to limit the attacker’s access to the cipher text. In this paper, we describe security based data confidentiality against an adversary to the encryption key and has access to a large fraction of the cipher text block. When the key will visible at once, us can access easily retrieve the data & Our data confidentiality, in wherever key is already visible mode. This section analyze the security of Bastion, and we show that it prevents leakage of any plaintext block as long as the adversary has access to the encryption key and to all but two cipher text blocks