Data Storage Issues in Cloud Computing

International Journal of Trend in Scientific Research and Development (IJTSRD)
Volume 4 Issue 2, February 2020 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470
@ IJTSRD | Unique Paper ID – IJTSRD30194 | Volume – 4 | Issue – 2 | January-February 2020 Page 906
Data Storage Issues in Cloud Computing
Nikhil Sreenivasan
Department of MCA SEM VI, YMT College of Management,
Institutional Area, Kharghar, Navi Mumbai, Maharashtra, India
ABSTRACT
Cloud Storage is a branch of Cloud Computing, which plays an important role
in IT world. Cloud providers are providing a huge volume of storage space as
per the user needs. Due to wide usage of this, it also increases data security
issues and threats. Hence efforts are being made to encrypt the data stored in
the cloud. In this paper, we are going to look at different encryption and
auditing techniques that are used to avoid data breaching in cloud storage.
KEYWORDS: Cloud Storage, Data Security threats, Risk
How to cite this paper: Nikhil
Sreenivasan "Data Storage IssuesinCloud
Computing"
Published in
International Journal
of Trend in Scientific
Research and
Development(ijtsrd),
ISSN: 2456-6470,
Volume-4 | Issue-2,
February 2020, pp.906-910, URL:
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I. INRODUCTION
Cloud computing is an emergingITtechnologythatisgaining
the tremendous exposure. Cloudcomputingisthedeliveryof
various computing resources like CPU, RAM, Storage etc to
the user over the computer network instead of physically
providing at the user location. The main goal of Cloud
computing is let the users take advantage of itwhichenables
them to access and store their data with ease. Cloud security
is composed of different set of policies, procedures and
techniques that work in conjunction with each other to
protect available resources. It includes different methods
ranging from authenticating the users to managing traffic in
cloud. Different cloud providers provide different security
solutions depending on the user’s need. A need for robust
cloud security is increasing day by day. Security threats like
data breaching, Phishing attacks, Viruses and Worms are
affecting the data stored and hence it results in a loss of user
data.
Figure 1[1]: Cloud Storage Model
A. Cloud Computing Services
The most common and widely adopted cloud computing services are Infrastructure as a Service (IaaS), Platform as a Service
(PaaS), and Software as a Service (SaaS).[2]
IJTSRD30194

International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470
Infrastructure as a Service (IaaS):
In IaaS, virtualized infrastructure is provided and handled for business organization by the service providers. It helps
companies expand their storage, servers and other network units which are connected throught the internet which offers
analogous functionality as that of on premises infrastructure. Some of the illustrations where IaaS is used includes website
hosting, backing up of data.
Platform as a Service (PaaS):
In this model, the users rent everything which they require for developing an application, and confide on the service provider
for tools, operating system and the required infrastructure. It simplifies the process of application development from the
developer’s point of view.
Software as a Service (SaaS):
In SaaS, the third party vendor makes use of the web to host the application which is made accessible to user’s over the
internet. It eradicates the need to do the installation of a particular application on an individual computer.
B. Encryption in Cloud Data Storage
As the data present in the cloud are stored in a distributed fashion, it is vital toencryptthedata.Cloudprovidersgrantdifferent
services for encryption before the data is shipped to the cloud for storage. It includes variety of encryptions ranging from
encrypting just the connections to complete end-to-end encryption. Local encryption provides an even effective security as
decryption is important before using the data. Keys are used for encryption. It is neccessary to store the Encryption keys
distinctly from that of encrypted data. Key backups should be kept in different place instead of keeping it onsite andexamined
frequently.
II. Literature Review
When user’s cynical assets are not within their reach, they have to ensure that their data issafeandsecuredandthe integrityis
maintained. When user’s make use of cloud computing,theystoretheirresourcesincloudprovider’sdatacentersandhencethe
providers are completely responsible for ensuring the security and avoid the data from getting leaked or so. With increasing
use of cloud computing, it also introduces new securitythreatslikeresourcesharing,data lock inandmalwareattacks.All these
threat prevents the users from using the facility of cloud computing and it also poses a huge risk to user’s data. To determine
the usefulness of building user’s trust, a number of researchers have carried research to single out and evaluate the elements
which plays a vital role in cloud computing, Few of the main works in this area of cloud computing are examined below.
This segment dictates a review of literature relevant to issues concerned with data security and data breaches in cloud
computing. Cloud computing is not an innovation, but a means to constructing IT services that use advanced computational
power and improved storage capabilities[4]. A brief analysis on different security issues and it’s different countermeasuresis
found in [5]. There are wide range of security concerns and different case studies related to it are reviewed in [6]. How the
Intrusion detection and Multifactor authentication can secure the data present has been discusses in [7].
Different security threats and related vulnerabilities are explained briefly in [8]. It is concluded that there is plenty of risk
linked with cloud computing and how this risk can be avoided and assessed is discussed in [9].
When small scale companies use cloud computing, there arises an increasing risk associated. The small business are
consistently looking for new tools and take up different software applications which has been discussed in [10]. Cloud
Computing used with Internet of Things, trust based security, and other issues are reviewed in [11][12]. Various Qualitative
measures related to information security [13], distributed type of environment and different challenges concerned with
security [14], hierarchy of security in cloud computing [15], privacy, security, accountability and integrity in the field of cloud
computing [16] are some of the vital areas in cloud computing security. The major vulnerabilities related to online storage
facilities like Box and Drop box are discussed in [17].
In this paper, we have discussed what is data breach, various data breach cases and different ways by which we can prevent
data breaching in Cloud computing.
III. Research Methodology
A. Data Breaching
A data breach is a term that relates to loss of sensitive, personal and confidential data due to unauthorized access.Information
that affect while data breach occurs include credit card numbers, social security numberandinformationrelatedtohealthcare
histories. Common reasons of data breach are weak passwords, unfixed, old system vulnerabilities or malware.
Data breach usually involves the following steps:
Research: The attacker exploits the vulnerability in the organization’s security.
Attack: The attacker initially establishes a connection with the help of a network.
Network Attack: It occurs when the attacker makes use of organization’s infrastructure vulnerability to penetrate their
network.
Ex filtration: After the attacker successfully gets the access of a computer, he then infiltrate the network and can easily
access personal confidential data.

Fig 2[3] Data Breach Diagram
B. Causes of Data Breach
Security threats takes place both from outside as well as within the system. Most of the breaches occur due to faulty systemor
application configuration followed by the user error. Both of these error can cost the company far more than what could
probably be the investment in reinforcing the defenses.
Fig 3[18] How Data Breach occur?
C. Different Ways to Avoid Data Breaches
There are multiple ways to avoid data breaches. Among all theavailableoptions,firstoneisspreadawarenessamongtheusers.
Unless and until this is done, other security measures is inadequate. Their other way is to create some kind of security policy
which imposes encryption on the data which makes the stolen data as useless. It is important to have an intrusion detection
system in every systems. Intrusion detection is probably the best way to preventdata breach.Drive-Bydownloadsisoneofthe
other way to avoid data breach. It is also possible to use susceptibility assessment programs. Most common way to avoid data
breach in software application is to regularly update the patches as an when they are available. It is necessary to monitor the
internal activities of the user and to take frequent backups of the data to avoid any security threat.
D. Encryption of data to avoid Data Breaches.
Encryption technologies are captious to assure the privacy of the data. It secures data which meet different compliance
concerns and privacy regulations. With encryption, it is possible to provide a safe and secure place for the users to store their
data. Data encryption is a techniques wherein the information is encrypted and it can only be accessed or decrypted by a
person having a correct encryption key. There are different types of Encryption viz; Data Encryption Standard(DES), Triple
DES, RSA, Advanced Encryption Standard(AES), Two Fish and encryption using SSL(Secure Socket Layer).
Data Encryption Standard:
It is the most popular algorithm. It is a symmetric-key algorithm. It is an implementation of Feistel Cipher. To encrypt or
decrypt data it makes use of Feistel structure. It uses 64 bit of block size. It has been found as sensitive to more dynamic
attacks. It is called as block cipher. It uses same algorithms for encrypting the data as well as decrypting it. It makes use of 56
bit key length. There are various kinds of modes including ECB and CBC or CFB. If each independent single bit is encrypted or
decrypted individually then it is knows as ECB whereas if each data is dependent on previous one, then it is called as CBC or
CFB. It includes Initial and Final Permutation after 16 rounds. Both are inverse to each other.

Process:
1. The 64 bit plain text is delivered over to an Initial Permutation function.
2. Initial Permutation is carried out.
3. It further forms two halves of the block called as Left Plain Text (LPT) and Right Plain Text(RPT).
4. Each of these blocks pass through 16 rounds of encryption procedure.
5. Finally, both of these blocks are assembled and the Final Permutation is executed on the blocks.
6. The end result of this entire procedure is a 64 bit cipher text.
Fig 4[21] DES Process
Hence, DES plays a vital role in preventing data breach in cloud by encrypting the data so that it can’t be easily accessible to
unauthorized users. It makes the data more secure. With increasing use of Cloud Computing, public and private organizations
using Cloud services are also facing the issues of data theft, privacy and securityissues. Theuseofsuchsecurityalgorithmsand
assuring it’s proper implementation helps in safeguarding end user security in an efficient way.
E. Auditing
A Remote Data Auditing is a technique which allows public audit ability of the stored data in the cloud. It is useful to check the
integrity and the reliability of the data which is present. Remote Data Auditingforsingleserverdoesnotsupportdata recovery.
The remote auditing approach in distributed cloud environment are critically assessed and are further categorized into three
classes; replication-based, erasure coding based and network coding based[19]. A data security audit is a process of auditing
what all data is present in cloud, how it functions and who has the rights to access the data present and creating a plan to
document it. After taking all the initial steps to protect the data, a security audit is vital to evaluatethecloudprovider’spresent
security systems so that a better future recovery plans can be made. Security audit should be performed regularly even when
no data breach occurs. There’s a difference between a post-data breach audit and a routine audit[20].Anauditconductedafter
data breach incident occurs is required to find and implement new fixesandsecurity policies.Aroutineauditwhichreferstoas
DNS Audit, will help the cloud service provider to secure it’s entire infrastructure and also to administer the systems. An
outdated DNS server can cause more harm. Inspecting the provider’s network, servers, open ports and IP blocks can help the
organization with a complete audit of data which is already exposed and accessed by the attackers.
F. Results
Due to an increasing use of cloud computing facility the threat to data stored are also increasing which is a major threat to the
user’s data. Due to weak security policies, data breach can takes place. Data breaching is a type of incident which leaks user’s
confidential, sensitive data into an unsecured environment. It is becoming an increasing threat to the data present orstoredin
the cloud. It is possible to avoid data breach by taking different preventive measures. The graph below depicts the number of
data breach incidents in respective years till date since 2005.

Fig 4[22] Number of data breaches since 2005 till date
IV. Conclusion
In this paper, we conferredtheunderstandingrelatedto data
breach in cloud computing. Cloud computing has many pros
and cons. However the cons directly effects the security of
the data. Data breach is caused by many factors like human
error, improper system and application configuration,
unauthorized access, hacking etc. Data breach caused due to
theft is more. Hence, it is vital to keep confidential and
sensitive data secret. Since 2011, the number of data breach
incidents has increased. Data breach caused due to
vulnerable code is less as compared to human errors. In this
paper, we have also discussedaboutthemethodologyofhow
data breach can be avoided successfully by using different
security policies and techniques like Intrusion Detection
System, encryption etc.
V. Future Enhancement
In our future work, we consider other means of forbidding
data breaches and recommend a broad framework that
marks all kinds of data breach in cloud computing. By
making use of more effective encryption algorithms and
strict policies it will be possible to completely eradicatedata
breach issues from cloud making cloud a reliable storagefor
the users.
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