A Paper on Security in Cloud Computing

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The Security of Cloud Computing System enabled by Trusted Computing Technology
Zhidong Shen
International School of Software,
Wuhan University,
Wuhan, China, 430079
zhidongshen@163.com
Qiang Tong
School of Software,
Northeastern University,
Shenyang, China, 110004
qiang.tong@163.com
Abstract—Cloud computing provides people the way to share
distributed resources and services that belong to different
organizations or sites. Since cloud computing share distributed resources via the network in the open environment, thus it
makes security problems important for us to develop the cloud computing application. In this paper, we pay attention to the security requirements in cloud computing environment. We
proposed a method to build a trusted computing environment
for cloud computing system by integrating the trusted
computing platform into cloud computing system. We propose
a model system in which cloud computing system is combined
with trusted computing platform with trusted platform module. In this model, some important security services, including
authentication, confidentiality and integrity, are provided in cloud computing system.
Keywords-cloud computing; trusted computing platform;
trusted computing; trusted service
I. INTRODUCTION
Since distributed systems and network computing were
used wildly, security has become an urgent problem and
will be more important in the future. In order to improve the work efficiency, the different services are distributed in
different servers that are distributed in different places. In contrast to the fast developing of distributed computing
technologies, people have remained insufficient in the field of information security and safety. In recently, a new trend attracts people’s attention. Users from multiple environment hope use the distributed computing more efficient, just like using the electric power. Then, cloud computing has

become a new star for this demand. cloud computing is
concerned with the sharing and coordinated use of diverse
resources in distributed organizations --- cloud, which is
consisted of different organizes and systems. Cloud
computing provides a facility that enable large-scale
controlled sharing and interoperation among resources that
are dispersedly owned and managed. Security is therefore a
major element in any cloud computing infrastructure,
because it is necessary to ensure that only authorized access is permitted and secure behavior is accepted. In a word, all members in the cloud and the cloud computing
environment should be trusted by each other, and the
members that have communication should be trusted by
each other. Trust is the major concern of the consumers and
provider of services that participate in a cloud computing
environment.
Because the cloud computing is composed of different
local systems and includes the members from multiple
environments, therefore the security in cloud is complicate. In one side, the security mechanism should provide
guarantees secure enough to the user, on the other side, the security mechanism should not be too complex to put the
users into an inconvenient situation. The openness and
flexibility of the computer and popular commercial
operating systems have been important factors supporting
their widespread adoption. However, that very same
openness and flexibility have been proved to be a double
edged sword, because it brings complexity, reduces trust
degree and threat against security. So there should be a
balance between the security and the convenience [5]. The
dependable and secure computing includes not only security
and confidentiality, but also reliability, availability, safety and integrity [10]. Considering these facts, we propose a
new way that is conducive to improve the secure and
dependable computing in cloud. In our design, we integrate
the Trusted Computing Platform (TCP), which is based on
Trusted Platform Module (TPM), into the cloud computing...
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