The document presents the concept of Key-Aggregate Searchable Encryption (KASE) for secure group data sharing in public cloud storage, addressing the challenges of managing multiple encryption keys. KASE allows a data owner to share multiple documents using a single key, simplifying key distribution and search processes for users. Performance evaluations indicate that the proposed scheme is both secure and efficient compared to existing methods.

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Key-Aggregate Searchable Encryption (KASE)
for Group Data Sharing via Cloud Storage
Abstract
The capability of selectively sharing encrypted data with different users via
public cloud storage may greatly ease security concerns over inadvertent data leaks
in the cloud. A key challenge to designing such encryption schemes lies in the
efficient management of encryption keys. The desired flexibility of sharing any
group of selected documents with any group of users demands different encryption
keys to be used for different documents. However, this also implies the necessity
of securely distributing to users a large number of keys for both encryption and
search, and those users will have to securely store the received keys, and submit an
equally large number of keyword trapdoors to the cloud in order to perform search
over the shared data. The implied need for secure communication, storage, and
complexity clearly renders the approach impractical. In this paper, we address this
practical problem, which is largely neglected in the literature, by proposing the
novel concept of keyaggregate searchable encryption (KASE) and instantiating the
concept through a concrete KASE scheme, in which a data owner only needs to
distribute a single key to a user for sharing a large number of documents, and the
user only needs to submit a single trapdoor to the cloud for querying the shared
documents. The security analysis and performance evaluation both confirm that
our proposed schemes are provably secure and practically efficient.

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Copyright © 2015 LeMeniz Infotech. All rights reserved
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LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
EXISTING SYSTEM
The capability of selectively sharing encrypted data with different users via
public cloud storage may greatly ease security.
DRAWBACK OF EXISTING SYSTEM
 Data leaks in the cloud.
 Large number of keys for both encryption and search.
 The implied need for secure communication, storage, and complexity clearly
renders the approach impractical.
PROPOSED SYSTEM
Proposing the novel concept of key aggregate searchable encryption (KASE)
and instantiating the concept through a concrete KASE scheme, in which a data
owner only needs to distribute a single key to a user for sharing a large number of
documents, and the user only needs to submit a single trapdoor to the cloud for
querying the shared documents.
ADVANTAGE OF PROPOSED SYSTEM
 The security analysis and performance evaluation.
 Provably secure and practically efficient.

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Copyright © 2015 LeMeniz Infotech. All rights reserved
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LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
SYSTEM SPECIFICATION
Hardware Requirements
System : Pentium IV 2.4 GHz
Hard Disk : 40 GB
Floppy Drive : 1.44 Mb
Monitor : 15 VGA Colour
Mouse : Logitech
Ram : 512 Mb
Software Requirements
Operating system : Windows Family
Tools : eclipse/Netbeans
Technology Used : Java
Backend Used : SQL Server