China Communications • June 2015
61
of big data sets, real-time data mining, and
streaming media delivery etc. Data-intensive
applications [3] and research will be integral
to many future scientific endeavors, but will
demand specialized security mechanisms to
make data centers efcient and secure. In ad-
dition, the research community now has the
option of accessing storage and computing
resources on demand, and the IT industry is
currently building multiple big data centers for
social networks and applications. Consequent-
ly, large amounts of clients’ private and secret
data (including meta-data) will be stored in
data centers, and will need protection during
processing and transmission. Thus, data cen-
ters should be able to provide efcient securi-
ty, access, and update mechanisms to not only
huge files running into petabytes, but also to
small les that are only a few hundred bytes.
In all the above cases, determining how to de-
sign a secure and efcient scheme for tenants
to access their data on the data center storage
is crucial.
The rest of the paper is organized as follows;
in Section II, some existing solutions for data
security and related works are described and in
Section III, a secure big data protected scheme
for cloud tenants is proposed. In Section IV, we
give a detailed analysis and comparison among
the proposed scheme and other schemes; In
Abstract: The Cloud is increasingly being
used to store and process big data for its ten-
ants and classical security mechanisms using
encryption are neither sufficiently efficient
nor suited to the task of protecting big data
in the Cloud. In this paper, we present an
alternative approach which divides big data
into sequenced parts and stores them among
multiple Cloud storage service providers.
Instead of protecting the big data itself, the
proposed scheme protects the mapping of the
various data elements to each provider using
a trapdoor function. Analysis, comparison and
simulation prove that the proposed scheme is
efcient and secure for the big data of Cloud
tenants.
Keywords: cloud computing; big data; stor-
age and sharing; security
I. INTRODUCTION
In modern information technology, big data
[1] is a term applied to data sets whose size is
beyond the ability of commonly used software
systems to store, manage, and process within
a tolerable elapsed time. Big data sizes are a
constantly moving target, currently ranging
from a few dozen terabytes to many petabytes
of data in a data center. A data center [2]
mainly focuses on the storing and processing
Secure Big Data Storage and Sharing Scheme for
Cloud Tenants
CHENG Hongbing
1,2
, RONG Chunming
3
, HWANG Kai
4
, WANG Weihong
1
, LI Yanyan
1
1
College of Computer Science, Zhejiang University of Technology, Hangzhou, 310023, China
2
State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093, China
3
Department of Electronic Engineering & Computer Science, University of Stavanger, 4036, Stavanger, Norway
4
Electrical Engineering and Computer Science, University of Southern California, Los Angeles, CA 90089, America.
SECURITY SCHEMES AND SOLUTIONS