Untitled

Abstract

Cloud computing is one of the powerful computing that connect the whole world. Huge amount of data get uploaded over cloud so that it can be accessible by the user at any time and any point. Security must be concerned related to confidentiality of data, integrity of data, availability etc. Data stored over cloud is physically not accessible to the user. Data modification can be done by unauthorized user or by some malicious activity so user needs to be ensure that their data is secure or not. Therefore mechanism is required where user can check if integrity of its data is maintained or compromised. There are various methods are available such as mirroring but it require more storage space. Sometimes we need TPA to verify the data. In this, user check the integrity of its data store over cloud environment and detect the suspicious activity. For this new scheme "Data Provenance" is used, that collect the history data of user. On the basis of which, suspicious activity is detected. Provenance data is used to collect the history data and identify the user behaviour. Using this we reduce the need of TPA and replication of data item on client side for integrity checking as checking part is done over cloud infrastructure.