Multi-Cloud Based Secured Storage System

Author Name(s): M.V.Bramhe, Dr. M.V.Sarode
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Present days’ cloud computing has become successful computer paradigm because of “pay-as-you-go” model. Various solutions were proposed for handling cloud vulnerabilities and threats but most of which concentrate on single cloud environment which faces many problems like malevolent system administrator, service failure, loss of data integrity and data intrusion problem which can be reduced by moving towards multiple cloud environment. This paper mainly focuses on techniques for reliable secured storage in Multi-cloud environment by securely deploying chunks of data in multiple clouds where adversary will never get complete data at one place.


Multi- Cloud, Inter Cloud, SaaS, PaaS


Cloud Computing is much popular for big and small organization because of its “pay-as-you-go” nature which has reduced operational and implementation cost. Cloud Computing is defined by NIST as model for enabling convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. It consists of 5 essential characteristics, three delivery models and four deployment models [1].

Many solutions were proposed for single cloud based environment to maintain cloud storage security bur it faces various issues like malicious system administrator, data integrity loss and data intrusion problem, failure of service, untrusted cloud provider which can be removed by shifting from single to multi cloud environment [7]. It is noted that around eighty percent research was carried on single clouds whereas only 20 percent research was done in multi-clouds [4].

User data is divided into multiple chunks and stored on various clouds in inter / multi cloud environment which eliminates all these threats as malicious user never get a complete data set.

We have proposed secured storage in Multi-Cloud environment where reliable and scalable data storage is created using cryptographic functions by uploading user’s data in multiple clouds.


The system is implemented for secured storage using Multi-cloud environment.  System uses cryptographic Encryption algorithm for secure uploading of the multiple data chunks to various private or public cloud Services.  User data can be retrieved successfully by downloading and merging chunks from multi clouds after successful user authentication. Even though very less work is carried out in multi-cloud environment than single cloud but it is observed that  in  multi  Cloud  based  systems    user  data  is fragmented among various private / public clouds so that adversary cannot get complete set of data at a time Which removes most of threats occurring in single cloud environment.

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