Secured Communication Model for Mobile Cloud Computing

ISSN (e): 2250 – 3005 || Volume, 05 || Issue, 05 || May – 2015 ||
International Journal of Computational Engineering Research (IJCER)
www.ijceronline.com Open Access Journal Page 17
Secured Communication Model for Mobile Cloud Computing
Ramandeep Singh Rajpal1,
Raghvendra Kumar2
1
Dept. of Computer Science and Engineering, LNCT College, Jabalpur, MP, India
2
Asst. Prof., Dept. of Computer Science and Engineering, LNCT College, Jabalpur, MP, India
I. INTRODUCTION
A technology that has fastest growing segments in IT and shown its high growth rate in the last few
years, is Cloud Computing. The technology uses the Internet and central remote servers to maintain data and
applications. Cloud computing allows consumers and businesses to use applications without installation and
access their personal files at any computer with internet access. This technology allows for much more efficient
computing by centralizing storage, memory, processing and bandwidth. Author of has reviewed that Cloud
Computing is composed of three well-known layers. Infrastructure-as-a-Service (IaaS) layer is in charge of
providing on-demand virtual infrastructures to third-parties using physical resources such as memory, storage
and processors. This virtual infrastructure typically allocates resources from data centers owned and managed by
the cloud provider and are used by customers through the Internet.
The Platform-as-a-Service (PaaS) layer provides automatic provisioning of ready-to-use middleware
services. Finally, the Software-as-a-Service (SaaS) layer makes use of the previous layers to offer end-user
software services to customers.
Figure 1: Service Model of Cloud Computing
1.1 Cloud Deployment Models
IT companies are providing services to the general public for a fee on-demand. This type of service is
called Public Cloud. On the other hand if the service is solely used within an organization and not shared with
people outside of the organization it is called Private Cloud. There is also a third kind, a combination of public
and private cloud. It is referred to as Hybrid. The cloud infrastructure is shared by several organizations and
supports a specific community that has shared concerns (e.g., mission, security requirements, policy, and
compliance considerations). It may be managed by the organizations or a third party and may exist on premise
or off premise [3]. Example: eBay. Choosing which one to deploy purely depends on the needs.
ABSTRACT:
As Cloud computing provides on-demand access to computational resources which together with pay-
per use business models; enable application providers seamlessly scaling their services. Cloud
computing infrastructures allow creating a variable number of virtual machine instances depending on
the application demands. An attractive capability for Software-as-a-Service (SAAS) providers is having
the potential to scale up or down application resources to only consume and pay for the resources that
are really required at some point in time; if done correctly, it will be less expensive than running on
regular hardware by traditional hosting.Major issue cloud computing facing today is security to
eliminate this problem this paper is providing poly alphabetic cipher method in a mobile application..
We present a novel approach to use high speed interconnected cluster in a cloud computing
environment
.environment. and evaluate the performance.
advent of cloud computing and benefits of Infrastructure as a Service (IAAS) scientists and researchers
are able to deploy their HPC applications in the cloud without worrying about the costs associated with
the infrastructure and other costs involved. Mobile cloud computing within is an integration of the
concept of cloud faced by MCC are privacy, authentication, data management. To eliminate these
problems this paper is providing poly alphabetic cipher method in an android operating system. We
present a novel approach to use high speed interconnected cluster in a cloud computing environment
and evaluate the performance.
Keywords: Cloud Computing, hybrid cloud, challenge text, security.

Secured Communication Model…
1.2 Challenges
Two important concerns in a cloud based environment are security and performance. A lot of research
is currently underway to analyze how clouds can provide High Performance Computing (HPC) capabilities.
Since the data centers are highly data intensive it is imperative that high performing applications should be
developed and deployed in the cloud to truly take advantage of them.
1.3 Comparisons with Other Computing
Cloud computing can be confused with:
Grid Computing:- A form of distributed computing and parallel computing, whereby a 'super and
virtual computer' is composed of a cluster of networked, loosely coupled computers acting in concert to perform
very large tasks.
Utility Computing:-The packaging of computing resources, such as computation and storage, as a
metered service similar to a traditional public utility, such as electricity.
Autonomic Computing:- Computer systems capable of self-management.
1.4 Definition of Cloud
The name cloud computing was inspired by the cloud symbol that's often used to represent the Internet
in flow charts and diagrams.
NIST definition of Cloud Computing is “Cloud computing is a model for enabling ubiquitous,
convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks,
servers, storage, applications, and services) that can be rapidly provisioned and released with minimal
management effort or service provider interaction. This cloud model promotes availability and is composed of
five essential characteristics, three service models, and four deployment models.”
Essential characteristics of Cloud Computing are the main items in its definition. They emphasize new
aspects of this model which discriminate it from other computing models.
1. On-demand self-service: A cloud consumer can provision computing resources without human
intervention.
Figure 2: Definition of Cloud
2. Broad network access: Cloud Computing utilizes existing networking technologies to deliver services to
customers and provide connectivity among stakeholders.
3. Resource pooling: Each cloud provider has several customers. Customer’s provision computing resources
dynamically from a resource pool and release them to the pool when there is no demand.
4. Rapid elasticity: Provisioning of resources can happen rapidly; also the demand for resources may vary
dynamically. When the demand increases, more resources are provisioned to scale out1 and when it decreases,
provisioned resources are released to scale in. This procedure happens quite fast.
5. Measured services: A pay-per-use business model is employed to measure the resource usage. Resource
usages for different type of services are metered based on the service type criteria. Also the provisioning is
managed and reported to required stakeholders.
This paper provides a new mechanism of security for the mobile cloud computing. Section 1 gives the brief
introduction of cloud computing, section 2 gives the brief introduction of mobile cloud computing. Section 3
details about the researches been done in this area and elaborates some prominent existing work done by the
researchers. Section 4 provides the details of the proposed work in this research.

1. Mobile Cloud Computing
Mobile cloud computing is the usage of cloud computing in combination with mobile devices. Cloud
computing exists when tasks and data are kept on the Internet rather than on individual devices, providing on-
demand access [1].
Applications are run on a remote server and then sent to the user. Because of the advanced improvement in
mobile browsers thanks to Apple and Google over the past couple of years, nearly every mobile should have a
suitable browser. This means developers will have a much wider market and they can bypass the restrictions
created by mobile operating systems [2].
Mobile cloud computing gives new company chances for mobile network providers. Several operators such
as Vodafone, Orange and Verizon have started to offer cloud computing services for companies.
Alibaba Group launched cloud computing-based operating system Aliyun on 29th July 2011. The Aliyun
operating system will feature cloud services such as email, Internet search and support for web-based
applications [1]. Users are not required to download or install applications onto their mobile devices.
2.1 Applications
Mobile applications are a rapidly developing segment of the global mobile market. They consist of
software that runs on a mobile device and perform certain tasks for the user of the mobile phone. As reported by
World Mobile Applications Market, about 7 billion (free and paid) application downloads were made globally in
2009 alone from both native and third-party application stores, generating revenues of $3.9 billion in the same
year. The global mobile application market is expected to be worth $24.4 billion in 2015, growing at a CAGR of
64% from 2009 to 2015. Apple is a typical example for the explosion of mobile applications[6]. Apple with a
whopping more than 4 billion downloads to date commanded more than 90% of the application market share in
2009. The success of Apple’s App Store has not only established the scalability of mobile applications, but has
also shown that the best of these offer the potential to generate enormous revenues.
2.2 Convenient Commerce
The explosion in the use of electronic commerce (e-commerce) by the business sector has been
tremendous since its inception only a few years ago. E-commerce is known as: buying and selling of products or
services over electronic systems such as the Internet and other computer networks. From governments to
multinational companies to one-person start-ups, e-commerce is increasingly viewed as a key business modality
of the future. Ease of transaction, widening markets, and decreased overheads are factors that make e-commerce
solutions more and more attractive, as evident with the growth of on-line sales.
Mobile Learning
Mobile learning today is becoming more popular as there are many people using mobile devices to
enhance their learning. Mobile learning (m-learning) is not only electronic learning (e-learning) but e-learning
plus mobility. It is clear that learning via mobile brings many benefits for mobile users. It brings the
convenience for them since they can learn anywhere they want in any convenient time from a portable device.
However, there is some research pointing out restrictions of traditional mobile learning such as: expensive
mobile devices, high cost of network, poor network transmission rate, and limited educational resources. As a
result, it is difficult for mobile learning to take full advantage and to be popular as well.
2.3 Mobile Healthcare
The development of telecommunication technology in the medical field helped diagnosis and treatment
become easier for many people. This can helps patients regularly monitor their health and have timely
treatment[8]. Also, it leads to increase accessibility to healthcare providers, more efficient tasks and processes,
and the improvement about quality of the healthcare services. Nevertheless it also has to face many challenges
(e.g., physical storage issues, security and privacy, medical errors). Therefore cloud computing is introduced as
a solution to address aforementioned issues. Cloud computing provides the convenience for users to help them
access resources easily and quickly[8]. Besides, it offers services on demand over the network to perform
operation that meet changing needs in electronic healthcare applications.
2.4 Mobile Computing
The analysis of the impact of mobile computing on the various services shows how the mobile
computing has changed each service. As mobile computing has become more popular over the past decade, it
has been under continuous development with advances in hardware, software and network. Mobile computing
has applications in our everyday life. Use of this technology has become a fundamental skill.
With mobile computing we can check our email messages, our bills, our bank accounts and our other
private information just by using a mobile phone or laptop anywhere[8]. All the functionalities obligate each
exchange data to make it safe and immune from any attack. Mobile computing services have simplified our
lives. Every day we get attached to a new device that includes a lot of functionalities and is based on mobile
computing, as examples, I-Phone from Apple, Net-Book, etc.

2.5 Concept & Architecture of Mobile Cloud Computing
Similar with Cloud Computing, there are a lot but nonconsensual definitions on what mobile cloud
computing is . In this work, we consider it is a novel computing mode consisting of mobile computing and cloud
computing, which provide cloud based services to users through the Internet and mobile devices. On one hand,
the mobile cloud computing is a development of mobile computing, and an extension to cloud computing. In
mobile cloud computing, the previous mobile device-based intensive computing, data storage admass
information processing have been transferred to ’cloud ‘and thus the requirements of mobile devices in
computing capability and resources have been reduced, so the developing, running, deploying and using mode
of mobile applications have been totally changed. On the other hand, the terminals which people used to access
and acquire cloud services are suitable for mobile devices like Smartphone, PDA, Tablet, and I-Pad but not
restricted to fixed devices (such as PC),which reflects the advantages and original intention of cloud computing.
Therefore, from both aspects of mobile computing and cloud computing, the mobile cloud computing is a
combination of the two technologies, a development of distributed, grid and centralized algorithms, and have
broad prospects for application.
Figure 3: Mobile Cloud Computing Architecture
As shown is the Figure 3, mobile cloud computing can be simply divided into cloud computing and mobile
computing. Those mobile devices can be laptops, PDA, Smartphone, and so on. Which connects with a hotspot
or base station by 3G, WIFI, or GPRS? As the computing and major data processing phases have been migrated
to ’cloud’, the capability requirement of mobile devices is limited, some low-cost mobile devices or even non-
Smartphone can also achieve mobile cloud computing by using a cross-platform mid-ware. Although the client
in mobile cloud computing is changed from PCs or fixed machines to mobile devices, the main concepts still
cloud computing. Mobile users send service requests to the cloud through a web browser or desktop application,
then the management component of cloud allocates resources to the request to establish connection, while the
monitoring and calculating functions of mobile cloud computing will be implemented to ensure the QOS until
the connection is completed.
2.6 Challenges in Mobile Cloud Computing
The main objective of mobile cloud computing is to provide a convenient and rapid method for users to
access and receive data from the cloud, such convenient and rapid method means accessing cloud computing
resources effectively by using mobile devices. The major challenge of mobile cloud computing comes from the
characters of mobile devices and wireless networks, as well as their own restriction and limitation, and such
challenge makes application designing, programming and deploying on mobile and distributed devices more
complicated than on the fixed cloud devices[2].
For a given standard, providing a quality guaranteed cloud service should consider the following facts: optimal
division of application between cloud and mobile device, interaction between low-latency and code offload,
high-bandwidth between cloud and mobile device for high speed data transmission, user-oriented cloud
application performance, self-adaptation mechanism of mobile cloud computing, and optimal consumption and
overhead of mobile devices and cloud servers. The following strategies can be used to response to the
challenges:
1. Upgrade bandwidth for wireless connection, make the web content more suitable for mobile network using
regional data centers.
2. Deploy the application processing node at the ’edge’ of cloud in order to reduce data delivery time.
3. Duplicate mobile devices to cloud using virtualization and image technologies, to process Data-Intensive
Computing (DIC) and Energy-Intensive Computing, such as virus scanning in mobile devices.
4. Dynamically optimize application push in cloud and the division with mobile terminals.

II. EXISTING SYSTEM
Mobile cloud computing which combines mobile computing, mobile internet, and cloud computing,
has become an important research area in the information technology since 2009. By introducing the concept
and features of mobile cloud computing, we analyze the system structure of mobile cloud computing.
Meanwhile, the security threats present in mobile cloud computing environment are given, and solutions for
against the corresponding threat are introduced [1]. Finally, an improved security service scheme is put forward
to help realize the controllability, customizability and adaptability of the mobile cloud computing environment
in this paper. Mobile Cloud Computing is a new concept, which offers Cloud resources and services for mobile
devices. It also brings several advantages to mobile devices and to the applications developed for them.
However, it increases the security risks and privacy invasion due to the fact that it combines mobile devices with
Cloud services and because there is not a well-defined application model[2]. The security issues are treated
independently and the existing security solutions are supplied separately by various providers. In this paper, we
propose a framework to secure the data transmitted between the components of the same mobile cloud
application; and to ensure the integrity of the applications at the installation on the mobile device and when
being updated. Our framework allows applying different security properties to different kinds of data and not the
same properties to all the data processed by the application. Also our approach takes into consideration the user
preferences and the mobile device performances. The mobile terrain is rapidly establishing itself as the reliable
node for accessing cloud hosted data. Today, commodity cloud providers especially from the Infrastructures-a-
Service (IAAS) cloud expose their service APIs which facilitates the “app-frication” of enterprise workflows on
mobile devices. However, these IAAS providers require the customer (i.e., the data consumer) to submit
multiple security credentials which are computation intensive for the purposes of authentication and
authorization. As a result, the authentication process introduces undesired delays in a mobile network when
consuming enterprise data due to the increasing computational demand and the voluminous HTTP header that is
transported across the wireless bandwidth.
III. PROPOSED WORK
From the challenges as discussed above, the major issue in implementing mobile cloud computing is to
divide the application on the mobile device in such a way so that it will require least resources on mobile device
and will apply minimum load on network to get the processing done on the cloud and display results to the user.
It also faces the problem of security of the data from the network users and over the cloud.
This work is offering to provide security of the mobile data for both the security over cloud and encryption /
decryption of the data over the network. The algorithm for this work is as follows:
Algorithm
Step 1: A User interface shall be created over cloud for adding the mobile id online, which is added after
password authentication by the mobile user.
Step 2: Mobile application shall be created using android application development tool, which shall connect to
the cloud database using SAAS application developed over the cloud.
Step 3: As the mobile app tries to communicate with the cloud application, it will require authenticating
internally with the mobile id which was added by the user through web application.
Step 4: After authentication, mobile will communicate with the cloud application using encrypted data.
Step 5: For encryption of the mobile data poly alphabetic substitution cipher will be used which is
faster and secure as require n26 permutations by the brute force attack Step 6: The work shall have following
implementation modules:
1. Mobile App Module
1. Authentication
2. Encryption using Poly Alphabetic Substitution Cipher
3. Decryption using Poly Alphabetic Substitution Cipher
2. SAAS Layer Application Module
1. Web Interface for Mobile Users
2. Encryption using Poly Alphabetic Substitution Cipher
3. Decryption using Poly Alphabetic Substitution Cipher
4. Communication module with Mobile Application
Step 7: Poly Alphabetic Substitution Cipher requires O(n) complexity to encrypt or decrypt the data.
IV. CONCLUSION
This study introduced mobile cloud computing as the latest emerging technology. Besides there are several
critical drawbacks in devices, which includes battery life time security issues etc. This research presents an

approach for improving the security and authenticity of mobile cloud computing in an android environment. In
future, next step will be to improve the battery lifetime of devices, which is using mobile cloud computing.
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