Effective Multi-Cloud Storage in Cloud

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Effective Multi-Cloud Storage in Cloud
Concept
The end of this decade is marked by a paradigm shift of the industrial information technology towards a pay-per-use service business model known as cloud computing. Cloud data Storage redefines the security issues targeted on customer’s outsourced data (data that is not stored/retrieved from the costumers own servers . !n this work we observed that" from a customer’s point of view" relying upon a solo S# for his outsourced data is not very promising. !n addition" providing better privacy as well as ensuring data availability can be achieved by dividing the user’s data block into data pieces and distributing them among the available S#s in such a way that no less than a threshold number of S#s can take part in successful retrieval of the whole data block. !n this paper" we propose a secured cost-effective multi-cloud storage (SC$CS model in cloud computing which holds an economical distribution of data among the available S#s in the market" to provide customers with data availability as well as secure storage. %ur results show that" our proposed model provides a better decision for customers according to their available budgets.

Objectives
 &ithout any concerns for efficient storage mechanisms and maintainability issues with large amounts of data storage.  Cloud data storage also redefines the security issues targeted on customer’s outsourced data. ARCHITECTURE

!EE" #OR THE STU"$ #rivacy preservation and data integrity are two of the most critical security issues related to user data. !n conventional paradigm" the organi'ations had the physical possession of their data and hence have an ease of implementing better data security policies. (ut in case of cloud computing" the data is stored on an autonomous business party that provides data storage as a subscription service. The users have to trust the cloud service provider (S# with security of their data. !n" the author discussed the criticality of the privacy issues in cloud computing" and pointed out that obtaining information from a third party is much easier than from the creator himself. )ollowing the pattern of paradigm shift" the security policies also evolved from the conventional cryptographic schemes applied in centrali'ed and distributed data storage" for enabling the data privacy.

%roble& State&ent
 This service does not only provide fle*ibility and scalability for the data storage.

%roposed Stud'
&e proposed an economical distribution of data among the available S#s in the market" to provide customers with data availability as well as secure storage. !n our model" the customer divides his data among several S#s available in the market" based on his available budget. +lso we provide a decision for the customer" to which S#s he must chose to access data" with respect to data access ,uality of service offered by the S#s at the location of data retrieval. This not only rules out

the possibility of a S# misusing the customers’ data" breaching the privacy of data" but can easily ensure the data availability with a better ,uality of service. %ur proposed approach will provide the cloud computing users a decision model" that provides a better security by distributing the data over multiple cloud service providers in such a way that" none of the S# can successfully retrieve meaningful information from the data pieces allocated at their servers. +lso" in addition" we provide the user with better assurance of availability of data" by maintaining redundancy in data distribution. !n this case" if a service provider suffers service outage or goes bankrupt" the user still can access his data by retrieving it from other service providers.

In this project to mitigate the threats facing cloud storage, we extended the cloud data storage to include multiple service providers, where each cloud storage represents a different service provider. Our motivation behind such an extension is that, the adversary, similar to any other cloud user, is abstracted from the actual clouds of servers implemented by different cloud service provider. One of the obvious objectives in this scenario is to minimize the cost of storage of the data pieces over service providers.

Scope of the Study :
We consider the storage services for cloud data storage between two entities, cloud user and cloud service providers. The cloud storage service is generally priced on two factors, how much data is to be stored on the cloud servers and for

how long the data is to be stored. In our model, we assume that all the data is to be stored for same period of time. We consider number of cloud service providers each available cloud service provider is associated with a factor, along with its cost of providing storage service per unit of stored data. very has a different level of !uality of service offered as well as a different cost associated with it. "ence, the cloud user can store his data on more than one according to the re!uired level of security and their affordable budgets.

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