INTEGRITY VERIFICATION IN MULTI-CLOUD BY USING PROVABLE DATA POSSESSION AND ALERT NOTIFICATION

Abstract

Integrity verification in cloud computing can be ensured by using a technique called Provable Data possession (PDP). In PDP model, it allows client to store data at an untrusted server and to verify that the server possesses the original data without retrieving it. It preprocesses the data and then send it to an untrusted server, by keeping a small amount of meta-data. The efficient PDP can be constructed for multi-cloud storage to support scalability of service and data migration. In this paper, multiple storage service providers cooperatively store and maintain client’s data based on homomorphic verifiable response and hash index hierarchy. The cooperation between the multiple service providers can be controlled and maintained by Trusted Third Party (TTP).  In addition, the Data Compression technique is used to compress the data and reduce the storage cost for clients. The alert notification is automatically sent to client when any malicious attack of client’s data is made by service provider along with the timing information.