Greetings from LansA Informatics
Pvt Ltd! We would like to let you know we have launched a training division exclusively
for CSE & IT Department students. In the mean time we have also launched a
separate IEEE / NON-IEEE Project development division only for CSE & IT
Students. Our moto is to provide the quality of education which would lead the
upcoming generation more strong in the technology.
HIGHLIGHTS:
1. We are happy to let you
know that we offer only projects related to CSE / IT.
2. Projects developed by
Experts with rich experience in technology
3. We have been recognized
by leading news papers such as "INDIAN EXPRESS",
"DINAKARAN",
and “DHINAMALAR".
4. Organized various
workshops and conferences in leading colleges like
DECENTRALIZED ACCESS
CONTROL WITH ANONYMOUS AUTHENTICATION OF DATA STORED IN CLOUDS
ABSTRACT:
We propose a new decentralized
access control scheme for secure data storage in clouds that supports anonymous
authentication. In the proposed scheme, the cloud verifies the authenticity of
the series without knowing the user’s identity before storing data. Our scheme
also has the added feature of access control in which only valid users are able
to decrypt the stored information. The scheme prevents replay attacks and
supports creation, modification, and reading data stored in the cloud. We also
address user revocation. Moreover, our authentication and access control scheme
is decentralized and robust, unlike other access control schemes designed for
clouds which are centralized. The communication, computation, and storage
overheads are comparable to centralized approaches.
EXISTING SYSTEM:
Much of the data stored in
clouds is highly sensitive, for example, medical records and social networks.
Security and privacy are, thus, very important issues in cloud computing. In
one hand, the user should authenticate itself before initiating any
transaction, and on the other hand, it must be ensured that the cloud does not
tamper with the data that is outsourced. User privacy is also required so that
the cloud or other users do not know the identity of the user. The cloud can
hold the user accountable for the data it outsources, and likewise, the cloud
is itself accountable for the services it provides. The validity of the user
who stores the data is also verified. Apart from the technical solutions to
ensure security and privacy, there is also a need for law enforcement.Efficient search on encrypted data is also an important concern in
clouds. The clouds should not know the query but should be able to return the
records that satisfy the query.
DISADVANTAGES OF
EXISTING SYSTEM:
·It is unsecure.
·No privacy.
·Anyone can able to access and modify the data.
·Problem here is that the data records should have
keywords associated with them to enable the search.
PROPOSED SYSTEM:
Although we proposed a decentralized approach, their
technique does not authenticate users, who want to remain anonymous while
accessing the cloud. In an earlier work, proposed a distributed access control
mechanism in clouds. However, the scheme did not provide user authentication.
The other drawback was that a user can create and store a file and other users
can only read the file. Write access was not permitted to users other than the
creator. In the preliminary version of this paper, we extend our previous work
with added features that enables to authenticate the validity of the message
without revealing the identity of the user who has stored information in the
cloud. In this version we also address user revocation, that was not addressed.
We use ABS scheme to achieve authenticity and privacy. Unlike our scheme is
resistant to replay attacks, in which a user can replace fresh data with stale
data from a previous write, even if it no longer has valid claim policy. This
is an important property because a user, revoked of its attributes, might no
longer be able to write to the cloud. We, therefore, add this extra feature in
our scheme and modify appropriately. Our scheme also allows writing multiple times
which was not permitted in our earlier work.
ADVANTAGES OF PROPOSED
SYSTEM:
·It provides authentication of users who
store and modify their data on the cloud.
·It revoked users cannot access data
after they have been revoked.
·Costs
are comparable to the existing centralized approaches.
SYSTEM
ARCHITECTURE:
SYSTEM CONFIGURATION:-
HARDWARE REQUIREMENTS:-
üProcessor-Pentium
–IV
üSpeed-1.1 Ghz
üRAM-512 MB(min)
üHard
Disk-40 GB
üKey
Board-Standard Windows Keyboard
üMouse-Two or Three Button Mouse
üMonitor-LCD/LED
SOFTWARE
REQUIREMENTS:
Operating
system:Windows XP.
Coding
Language:.Net
Data
Base:SQL Server 2005
Tool:VISUAL STUDIO 2008.
REFERENCE:
Sushmita Ruj, Milos Stojmenovic and Amiya Nayak, “Decentralized Access Control with Anonymous Authentication
of Data Stored in Clouds”IEEE
TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 25, NO. 2, FEBRUARY 2014.
Panda: Public Auditing for Shared Data
with Efficient User Revocation in the Cloud CLICK HERE TO VIEW THE OUTPUT
ABSTRACT:
With
data storage and sharing services in the cloud, users can easily modify and
share data as a group. To ensure shared data integrity can be verified publicly,
users in the group need to compute signatures on all the blocks in shared data.
Different blocks in shared data are generally signed by different users due to
data modifications performed by different users. For security reasons, once a
user is revoked from the group, the blocks which were previously signed by this
revoked user must be re-signed by an existing user. The straightforward method,
which allows an existing user to download the corresponding part of shared data
and re-sign it during user revocation, is inefficient due to the large size of
shared data in the cloud. In this paper, we propose a novel public auditing
mechanism for the integrity of shared data with efficient user revocation in
mind. By utilizing the idea of proxy re-signatures, we allow the cloud to re-sign
blocks on behalf of existing users during user revocation, so that existing
users do not need to download and re-sign blocks by themselves. In addition, a
public verifier is always able to audit the integrity of shared data without
retrieving the entire data from the cloud, even if some part of shared data has
been re-signed by the cloud. Moreover, our mechanism is able to support batch
auditing by verifying multiple auditing tasks simultaneously. Experimental results
show that our mechanism can significantly improve the efficiency of user
revocation.
EXISTING SYSTEM:
To
protect the integrity of data in the cloud, a number of mechanisms have been
proposed. In these mechanisms, a signature is attached to each block in data,
and the integrity of data relies on the correctness of all the signatures. One
of the most significant and common features of these mechanisms is to allow a public
verifier to efficiently check data integrity in the cloud without downloading
the entire data, referred to as public auditing (or denoted as Provable Data
Possession ).This public verifier could be a client who would like to utilize
cloud data for particular purposes (e.g., search, computation, data mining,
etc.) or a third party auditor (TPA) who is able to provide verification services
on data integrity to users. Most of the previous works focus on auditing the integrity of personal data.
DISADVANTAGES OF
EXISTING SYSTEM:
vEspecially
when the number of re-signed blocks is quite large.
vExisting
users may access their data sharing services provided by the cloud with
resource limited devices, such as mobile phones.
vFrequent
Security Issues.
PROPOSED
SYSTEM:
We
propose Panda, a novel public auditing mechanism for the integrity of shared
data with efficient user revocation in the cloud. In our mechanism, by
utilizing the idea of proxy re-signatures, once a user in the group is revoked,
the cloud is able to resign the blocks, which were signed by the revoked user, with
a re-signing key. As a result, the efficiency of user revocation can be
significantly improved, and computation and communication resources of existing
users can be easily saved. Meanwhile, the cloud, which is not in the same
trusted domain with each user, is only able to convert a signature of the
revoked user into a signature of an existing user on the same block, but it
cannot sign arbitrary blocks on behalf of either the revoked user or an
existing user. By designing a new proxy re-signature scheme with nice
properties, which traditional proxy re signatures do no have, our mechanism is
always able to check the integrity of shared data without retrieving the entire
data from the cloud.
ADVANTAGES OF PROPOSED
SYSTEM:
vEasily Revocable of signatures for the
existing users.
vThe public verifier can audit the integrity
of shared data without retrieving the entire data from the cloud.
SYSTEM
ARCHITECTURE
SYSTEM CONFIGURATION:-
HARDWARE REQUIREMENTS:-
Processor-Pentium
–IV
Speed-1.1 Ghz
RAM-512 MB(min)
Hard Disk-40 GB
Key Board-Standard Windows Keyboard
Mouse-Two or Three Button Mouse
Monitor-LCD/LED
SOFTWARE
REQUIREMENTS:
Operating
system:Windows XP.
Coding
Language:.Net
Data
Base:SQL Server 2005
Tool:VISUAL STUDIO 2008.
REFERENCE:
Boyang
Wang, Baochun Li, and Hui Li, “Panda: Public Auditing for Shared Data with
Efficient User Revocation in the Cloud” IEEE TRANSACTIONS ON SERVICE
COMPUTING VOL. PP, NO. 99, December 2013
