Integrity Checking in Cloud Storage using Simple Encryption Algorithm

Abstract

Using cloud storage, users can remotely store their data and enjoy the on-demand high-quality applications and services from a shared pool of configurable computing resources, without the burden of local data storage and maintenance. However, the fact that users no longer have physical possession of the outsourced data, that makes the data integrity protection in cloud computing a formidable task, especially for users with constrained computing resources. Integrity checking becomes an imperative to secure data in a cloud environment. Many of existing protocols reveals client’s sensitive data by sharing the encryption and decryption keys with the cloud server. The proposed work draws conceptual cloud architecture by adopting an encryption algorithm with dynamic small size key to ensure the security and data integrity. It involves a third party broker. The broker takes the client request and encrypts the client’s information for ensuring the security, partitioned into multiple segments based on the remaining dynamic storage capacity presents in the VMs of the cloud storage server and store these encrypted segments of the client’s file on the corresponding VMs of cloud storage providers. It then generates the hash values of the encrypted data segments and stores these values in database manager for the purpose of Integrity Checking. In the existing method the encryption algorithm takes more memory space and time taken for division operation, storing the remainder and quotient in result is also high. My proposed method reduces the memory space and time taken for encryption of data.

 

Key terms: encryption, decryption, cloud storage, Brokers