IRJET- Secure Cloud Data Using Attribute Based Encryption

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 396
Secure Cloud Data Using Attribute Based Encryption
Miss. Chopade Sonali S.1, Miss. Bade Prachi N.2, Miss. Bagal Shweta A.3
Miss.Kapurkar Megha E.4
BE Student of Department of Computer Science and Engineering ,AGTI’S Dr.Daulatrao Aher College of Engg,
Karad, Maharashtra,India
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Abstract— Currently world there are many extra
challenges for security of data and access handle when
users outsource sensitive data for sharing on another
party server known as cloud servers, which are not
within the same trusted domain as data owners. The
existing ideas usedtomaintain confidentiality of personal
medical record (PMR) against untrusted servers by
disclosing data decryption keys only to authorized users.
However, in doing so, these answer inevitably introduce
complexity in key management also burden on the data
owner in data management well as in key management.
The problem of simultaneously achieving security and
data confidentiality and fine-grainedness of access
control still remains unresolved. This paper addresses
this challenge 1) Key management, 2) Defining and
enforcing access policies based on dataattributes,and, 3)
Keyword search over the encrypted data. PMR(patient
medical record)in the system users need to deal with
complicated key the management problem to accomplish
fine-grained access control when their PMRs are
encrypted using symmetric key cryptography or
asymmetric key cryptography and With our scheme
multi-authorityattributebased accesscontrol(MA-ABAC)
we can reduce the key management complexity for
owners and users. For this users are divided into the
two domains; professional domain and personal
domain. To achieve security of PMR, key management,
user revocation and efficient keyword searchexploiting
KP-ABE, Multi-authority attribute based access
control(MA-ABAC), and uniquely combining it with
techniques of proxy re-encryption.
Keywords—Attributebasedencryption,Cloudcomputing,
Fine-grained access control, KP-ABE, MA-ABAC, User
Revocation, Proxy Re-encryption.
I. INTRODUCTION
Many companies have their maintenanceandthey provide
lots of cloud computing services. More and more sensitive
data from consumers have been concentrated into the cloud
for its flexible management and economic savings. It is an
exceptionally hard to look the most suitable services or
products for ordinary consumers, as there are so many
services and has turned out to be more pervasive, because of
its advantages for consumers, including a products in cloud.
It is very general that before outsourcingthesensitivedatait
is encrypted. It is difficult to encrypting full data first and
then decrypting that data, due to the large bandwidth and
computation burden. ConsumersmayneedCloudcomputing
is a new trend of computing where resources like storage,
computation poor, network, applications etc. are delivered
as services. Pay-as-you-consume cloudcomputingparadigm
to retrieve only certain specific dateless they are fascinated
of the whole data collection. Cloud services provide great
conveniences for the users to enjoy the on demand cloud
applications without considering the local infrastructure
limitations. During the data accessing,differentusersmaybe
in a collaborative relationship, and thus data sharing
becomes significant to achieve productive benefits. The
existing security solutions mainly focus on the
authentication to realize that a user’s privative data cannot
be unauthorized accessed, but neglect a subtle privacy issue
during a user challenging the cloud server to request other
users for data sharing.
1.1 Motivation
There are already well-known existing securitysolutions
mainly focus on the authentication to realize that a user’s
privative data cannot be unauthorized accessed, but neglect
a subtle privacy issue during a user challenging the cloud
server to request other users for data sharing. The
challenged access requestitself mayreveal theusersprivacy.
The existing systems define shared authority basedprivacy-
preserving authentication protocol which allows security
and privacy in the cloud storage. In this, shared access
authority is achievedbyanonymousaccessrequestmatching
mechanism with security and privacy considerations.
Attribute based access control is adopted to realize that the
user can only access its own data fields; proxy re-encryption
is applied by the cloud server to provide data sharingamong
the multiple users
1.2 Project Overview
In cloud it’s a common practice to encrypt the data before
it is been stored in cloud storage. Access control is another
added security upon the encrypteddata to bestronglystored
in the cloud platform. At the start of the module while
registering the user verification is checked through the OTP
by Email. Attribute Based Encryption- ABE is finding its
existence in cloud technology since it can deliver data
privacy with one-to-many, fine grained and non-interactive
access control.CP-ABE- Cipher text-policy attribute based

encryption is a modified version of ABE with moreflexibility
in delivering security for general applications. Cloudservice
provider (CSP) manages all the servers and services
provided to the client. The data owner can encrypt, decrypt,
secure, store and share data to CSP. The files stored in cloud
platform follow a hierarchical structure.
1.3 Need of Project
There square measure already well-known existing
security solutions in the main specialize in the
authentication to appreciate that a user’s privative
information cannot be unauthorized accessed, however
neglect a refined privacy issue throughouta userdifficultthe
cloud server to request different users for information
sharing
II. LITERATURE SURVEY
Hong Liuet al. [1] explain Cloud services provide great
conveniences for the users to enjoy the on-demand cloud
applications without considering the local infrastructure
limitations. The existing security solutions mainly focus on
the authentication to realize that a user’s privative data
cannot be unauthorized accessed, but neglect a subtle
privacy issue during a user challenging the cloud server to
request other users for data sharing. The challenged access
request itself may reveal the user’s privacy no matter
whether or not it can obtain the data access permissions. In
this paper, propose a shared authority based privacy-
preserving authentication protocol (SAPA)toaddressabove
privacy issue for cloud storage. In the SAPA,
JingiLi, Jinet al.[2] suggests a design to solve the problem of
integrity auditing and secure deduplication on cloud data.
Specifically, aiming at achieving both data integrity and de
duplication in cloud, propose two secure systems, namely
Sec Cloud and Sec Cloud+.Sec Cloud introduces an auditing
entity with maintenance of a Map Reduce cloud, whichhelps
clients generate data tags before uploading as ll as audit the
integrity of data having been stored in cloud.
Prof. Rucha R. Galgali [3] investigated the problem relatedto
the data privacy variousschemes are proposed based on the
attribute based encryption techniques,still moreattentionis
on privacy of the data content and the access control of the
data and less attention is on the privilege control and the
privacy of user’s identity. In these presents Anony Control
scheme which address data privacy as ll as users identity
privacy also presents Anony Control-F for fully preventing
the identity problems. In proposed scheme add user
revocation in users to enable activating and deactivating
users to enhance efficiency of system and adding more
feasibility.
III. PROBLEM DEFINITION & SCOPE
A) Problem Statement
To provide security to the data on cloud by encrypting it
by using Advanced Encryption Standard algorithm and
Attribute Based Encryption scheme.
B) Reserch Scope
In our proposed system, we can store data securely on
cloud by encrypting it using AES and ABE algorithms. Also,
we can share data securely on cloud. Here, data is encrypted
by sender by using public key and same can be decrypted at
receiver side using private key. Therefore though the data is
captured by hacker, he cannot decrypt is it until he gets
private key, hence data is secure over the cloud.
C) Area of Reserch
Cloud computing is emerging paradigm provides various IT
related services. The security and privacy are two major
factors that inhibits the growth of cloud computing.Security
factors are reasons behind lesser number real time and
business relates cloud application compared to consumer
related cloud application.Firstly,the pros and cons of
different Attribute based encryption methods are
analyzed.Secondly,a new encryption method based on
Attribute Based Encryption (ABE) using hash function,
digital signature and asymmetric encryption scheme has
been proposed.Our proposed algorithm is simplified yet.
efficient algorithm that can implemented for cloud critical
application
.
The keys only associated with the policy that is to be
satisfied by the attributes that are associating the data can
decrypt the data. Key policy AttributeBasedEncryption(KP-
ABE) scheme is a public key encryption technique that is
designed for one-to-many communications.
2.4 Goals and Objectives
i] To encrypt data and store on cloud to protect from
hackers.
ii] For reliability and conventionality of cloud user.
iii] To provide data security.
iv] To provide access control.
v] To reduce the complexity involved in key
management where the user can encrypt his/her
private data.
IV. SOFTWARE DESIGN
A) Data flow diagram:
A data flow diagram (DFD)isa graphical representationof
the "flow" of data through an information system, modelling
its process aspects. A DFD is often used as a preliminarystep
to create an overview of the system without going into great
detail, which can later be elaborated. A context diagram is a
top level (also known as "Level 0") data flow diagram.Itonly
contains one process node ("Process 0") thatgeneralizesthe
function of the entire system in relationship to external
entities. DFD Layers. ... Draw the context diagram first,
followed by various layers of data flow diagrams. DFD
Levels.

Fig. Dataflow Diagram-level 0
1st Level DFD:
Fig. Dataflow Diagram-level
B) Flow Chart:
A flowchart is a diagram that depicts a process, system or
computer algorithm. They are widely used in multiple
fields to document, study, and plan, improve and
communicate often complex processes in clear, easy-to
understand diagrams.
Fig.Flow Chart
V. IMPLEMENTATION DETAILS
Step 1: The application not only provides data content
privacy but also includes identity privacy by using
AnonyControl. AnonyControl decentralizes the central
authority to hide the identity of origin and semi-anonymity
is achieved with this. Subsequently, the AnonyControl-F,
which entirely hides the identity, helps in attaining full
anonymity.
Step 2: System uses Attribute Encryption Standard (AES)
algorithm. The algorithm is used to protect classified
information and is used by the entire world to encrypt and
decrypt sensitive data. AES consists of three block ciphers.
AES-128, AES-192, AES-256 and this each cipher uses 128
bits of blocks using cryptographic keys 128,192and256 bits
to encrypt and decrypt delicate data. The ciphersinstalledin
this algorithm uses. The same secret key for encrypting and
decrypting.The different rounds of keys that is executed.
Each series consists of steps that include substitution,
transposition, and mixing of plain text. Then the plain text is
transformed into cipher text.
Step 3: There are four types of systems: N Attribute
Authorities (denoted as A), Cloud Server, Data Owners and
Data Consumers. A user can be a Data Owner and Data
Consumer in one session. Data owner encrypts and uploads
the files to the cloud server. Data consumer decrypts and
downloads the files from the cloud server.
Step 4: To perform any operations on files and to have
unlimited access to such records, the data owner and data
consumer should first register in the application. When the
registered at a time password, and unique id will send to
their registered mail id.
Step 5: To upload and download files by the user. The user
data owner/data consumer requests authority for
permission. The authority provides publickeytodata owner
and private key to the consumer. Issuing keys to authority
and authentication in our system is succeeding using
attribute-based encryption.
Step 6: Attribute-based encryption is a type of public-key
encryption in which the secret User key and the cipher text
are dependent upon (e.g., the country he lives, or the kind of
Subscription he has). In such a system, the decryption of a
cipher text is conceivable only if the set of attributes of the
user key matches the attributes of the cipher text. A critical
security aspect ofAttribute-Based Encryption is collusion-
resistance. An adversary that holds multiple keys should be
able to access data if at least one individual key grants
access.
Step 7: The keys provided by the authoritytotheusers(data
owner and data consumer) can be used to perform
operations and to have access to files in and out from the
cloud server.

Fig. Implementation details
A) Cloud Computing
Data privacy a lot of study has been done on the potential of
cloud and the services that cloud computing can and could
deal. These services can be characterized into four main
sections: Storage as a Service (StaaS), Platform as a Service
(PaaS), Infrastructure as a Service (IaaS) and Software as a
Service (SaaS).Following section highlights these services
and their usage in depth.
B) Storage as a Service:
Cloud offers a storage space that is huge, seemingly
boundless, and rising every day. Storage as a Service (StaaS)
allows cloud applications to gauge beyond their inadequate
servers. Cloud storage systems needs to focus on
requirements for upholding users' data and information,
considering high performance, availability, replication, data
reliability and reliability. The accountability to individual is
maintainedandupholdscustomersowncomputerstorageas
cloud vendors deal them the choice of loading their
information in the cloud which is reachable whenever they
need. Unfortunately, due to the contradictory nature of the
necessities of cloud services, no one system implements all
of them together.
C) Security Issues:
Companies are promptly movingontocloudbecausethey
can now use the greatest capitals available on the market in
the blink of an eye and also decrease their operations cost
radically. But as more and more information is moved to the
cloud the security concerns have continuing to grow. Data
breaking is the biggest security issue. A capable hacker can
easily get into a client side application and get into the
client's intimate data .Incompetent and faulty APIs and
interfaces become the target. IT companies which provide
cloud services allow third party companies to alter the APIs
and familiarize their own functionality which in turn allows
these companies to comprehendtheinternal workingsof the
cloud. Denial of Service (DoS) is also a major menace
wherein the user is approved partial or not at all access to
their data. Companies now use cloud very frequently say all
days and DoS can root huge increase in cost bothfortheuser
and service provider. Connection snooping is that inwhicha
hacker can scan your online actions and copy/replay a
particular broadcast to get into your private data. It can also
lead to the user to unlawful or unsolicited sites. Data loss is
also another issue.
C) Privacy Preservation
Trusted third party: an optional and neutral entity, which
has advanced capabilities on behalf of the users, to perform
data public auditing and dispute arbitration.
D) Shared authority
To address the above-mentioned privacy issue to propose
privacy preserving authentication protocol (SAPA) for the
cloud data storage based on cloud storage which gives
authentication and authorization without concedingprivate
information. The main consideration will be as follows:
1) A new privacy challenge in cloud storage is to be located
and also to identify an in-direct privacy for data sharing, in
which the challenged request itself cannot get the user's
privacy 2) Designanauthenticationprotocol whichenhances
a user's access request, which is related to the privacy. The
shared access authority is achieved by unidentified access
request matching mechanism. 3) Cipher text-policy is
applied and a user can access its own data fields and proxy
re-encryption is accepted toprovideauthorizeddata sharing
among multiple users.
VI. CONCLUSIONS AND FUTURE SCOPE
In our Approach, in the cloud computing to achieve
privacy-preserving access authority sharing.Authentication
is established to guarantee data confidentiality and data
integrity. Data anonymity is achieved since the wrapped
values are exchanged during transmission. User privacy is
enhanced by anonymous access requeststo privatelyinform
the cloud server about the users access desires. Forward
security is realized by the session identifiers to prevent the
session correlation. It indicates that the proposed scheme is
possibly applied for enhanced privacy preservation in cloud
applications.
VII .ACKNOWLEDMENT
We would like to give the special thanks to the computer
science engineering department of the college DACOE HOD
Prof. Ashish N. Patil and Project guide Prof. Sayali P. Shinde
to have their guidance. We are also thankful to the
technologies that we have used to havesuchformatofpaper.
REFERENCES
[1]Hong Liu, Student Member, IEEE, HuanshengNing,Senior
Member, IEEE, QingxuXiong,Member, IEEE,andLaurence
T. Yang, Member, IEEE “Shared Authority Based Privacy-
preserving Authentication Protocol in Cloud Computing”
IEEE Transactions on Parallel andDistributed Systems
Volume: 26, Issue: 1, Jan. 2015.

[2]JingiLi,JinLi,DongqingXie and ZhangCai“SecureAuditing
and Deduplicating Data in Cloud” DOI
10.1109/TC.2015.2389960, IEEE Transactions on
Computers
[3] Amol D Shelkar, Prof.Rucha R. Galgali, “ Data Access
Privilege With Attribute Based Encryption and User
Revocation”, International Research Journal of
Engineering and Technology (IRJET), Nov 2016.
[4] Praveen N.R and Renju Samuel,” Enhanced Efficient User
Revocation Mechanism on Top of Anonymous Attribute
Based Encryption” , International Journal of Emerging
Technology in Computer Science Electronics, AUGUST
2016.
[5]M. Satishkumar,B. dayKumar,Ch.ArunKumar,”Attribute
Based Data Sharing with At tribute Revocation toControl
Cloud Data Access”, International Journal of
Computational Science, Mathematics and Engineering,
February-2016.
[6] MuhammadYasirShabir, AsifIqbal,ZahidMahammad,and
AtaullahGhafoor, “ Analysis of Classical Encryption
Techniques in Cloud Computing” , ISSN 1007-0214 09/10
pp102-119 Vol. 21, Number1, February

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