Flexible And Efficient Encryption Scheme For Data Dynamics On Encrypted Outsourced Data To Public Cloud

摘要

Persistence of data has been around for many decades. In computer science, storing data permanently and efficiently is the rationale behind all the innovations in the persistence media. The contemporary technology to store and handle voluminous data is the storage service rendered by cloud computing platforms. However, data owner has no control over cloud infrastructure. It is totally in an untrusted environment. Nevertheless, there have been some mechanisms to deal with the security of data that has been outsourced. Right from public auditing methods to provable data possession to data integrity methods came into existence to ensure cloud storage security. Cryptographic methods could solve security problems. However, flexible encryption methods that help in secure data outsourcing that supports search and data dynamics on encrypted data are still desired. In this paper, we proposed a methodology that handle secure data storage in cloud and allow operations directly on encrypted data. Besides it takes care of the different formats of data. Jelastic cloud platform is used with two kinds of environments, one for structured data and one for unstructured and semi-structured data, are used for empirical study. A prototype application is built using Java programming language that facilitates intuitive interface to have flexible encrypted storage in public cloud and data dynamics directly on encrypted cloud datawith the help of Homomorphic Encryption (HE). The empirical results showed that the proposed system is more efficient than many existing methods.