Abstract—No examples of public clouds. Hybrid Cloud: Hybrid

Abstract—No
doubt that the Cloud computing technology are gaining the
ubiquitous adaptation due to the countless features they provide. Although, the
security & privacy problems are the main considerable encumbrance holding
back the universal adoption of this new emerging technology. The main obstacle
or hindrance of the cloud adaptation among the small or big enterprises is the privacy as well as the security of
their data. In this paper we have mainly focused at the service providers side
by suggested the various cipher encryption algorithms. So as to make the cloud
trusty and offer the desired security features to the cloud user’s. 

 

Keywords
– Security, Encryption Algorithms, RSA, AES, DSA, Blowfish.

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    I. Introduction:

Cloud computing
proposes a new way of computing. It provides the development of environment and
the allocation as well as the reallocation of computer resources as per the
demand. Virtually it satisfies the on demand needs of the user and facilitates
the resources “as a service model”. The cloud technology offers are we can say
it another words that it provides the ability for both small as well as the big
organizations to move/shift their data globally. It is a of using the remote
services through a network. Cloud computing allows its users to use maximum
number of resources through minimum resources available at the user’s end. The
cloud computing environment facilitates the way to use the computing resources
through a device that is capable of connect the user to the server at any location
across the world and also the users are not bounded to store the data at their
end because the data is stored on the server.

Cloud
concept reduces the cost of hardware at the user end. Users are not bounded to
store their data at the user’s end because the data is stored on the cloud.
Through the Cloud users can access their data through any location.

TYPES OF
CLOUDS

The environment of cloud
computing is divided into three different categories as per their usage and
requirement include, private cloud, public cloud and hybrid cloud.

Private cloud:  Private clouds are owned by the single
organization.  The private cloud
provides better control and more flexibility. They are very expensive and
secure when we compare them to other clouds. The providers and the users
have a very good control of the cloud infrastructure. One of the best
examples of a private cloud is Eucalyptus Systems 8.  
Public Cloud:  They are totally hosted and maintained
and are shared on a larger scale. Consumers pay for the resources that
they use. Users have a little control over the cloud infrastructure.
Microsoft Azure, Google App Engine are the examples of public clouds.
Hybrid Cloud: Hybrid clouds is the
composition of two or more cloud models, linked each other in a way so
that the data transfer takes place between them without affecting each
other. These types of clouds are created by the large enterprise. In this
model, the company outlines the main goals and requirements of services
9.  But the major drawback of the
hybrid cloud is the difficulty in effectively creating and governing such
a solution.

·     
Community Cloud: This type
of cloud is basically managed by group of originations that have a common
objective to achieve. The members share access to the data in the cloud.

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