Cloud Computing: Data Storage Security in Green Technology Perspective

Pallavi Singh
MCA Vth Semester
SoS in Computer Science & I.T.
Pt. Ravi Shankar Shukla University, Raipur (C.G.) pallavisingh.530@gmail.com Surendra Kumar Patel
Assistant Professor
SoS in Computer Science & I.T.
Pt. Ravi Shankar Shukla University, Raipur (C.G.) surendrapatelit2004@gmail.com Anil Kumar Sharma
Assistant Professor
Department of Mathematics and Information Technology
Govt. N.P.G. Science College, Raipur (C.G.) sharmaanil.mail@gmail.com Abstract— Cloud computing is a new field in Internet computing that provides novel perspectives in internetworking technologies and raises issues in the architecture, design, and implementation of existing networks and data centers. In these beliefs, users of cloud storage services no longer physically maintain direct control over their data, which makes data security one of the major concerns of using cloud. This paper investigated the problem of data security in cloud data storage, which is fundamentally a dispersed storage system.

Index Terms—Cloud Computing, Data Storage, Security, Green Computing.
1. INTRODUCTION
The remarkable development of cloud computing in recent years is increasingly sparking the interest of Internet and IT users seeking to derive the greatest benefit from the services and applications available on line via the web in service-on-demand mode with per-usage billing. Cloud computing offers a new economic model for ICTs – a model which heralds new modes of investment in, and operation of, IT resources. With cloud computing, organizations, institutions and companies no longer need to invest heavily in such resources, which are of necessity limited and require burdensome and costly internal management, having instead the option to migrate to a cloud model enabling them to purchase or lease resources on line. This model frees them from internal management costs, the IT resources being administered by the cloud computing provider. “Cloud computing is a model for enabling network users’ on-demand access to a shared pool of configurable computing resources that can be rapidly provisioned and released to the client without direct service provider interaction.” [1]
2. CLOUD COMPUTING
Cloud computing is a new field in Internet computing that provides novel perspectives in internetworking technologies and raises issues in the architecture, design, and implementation of existing networks and data centers. Cloud is a collection and interconnection of utilities (mail, storage, computer power, databases, social networks, banking, software, applications, infrastructure, other commodity services and future commoditize’ble services) that follows and serves the human being on subscription.

2.1 Cloud Computing Services
Cloud computing comprises five types of service:

– Infrastructure as a Service (IaaS): virtualized on-demand server, virtualized data centre, flexible on-demand storage space, flexible local networks (LANs), firewalls, security services, etc.

- Platform as a Service (PaaS): platform for cloud computing service provision (customer service management, billing, etc.)

– Software as a Service (SaaS): business applications, customer relations and support (CRM), HR, finance (ERP), online payments, electronic marketplace (for very small and small and medium sized enterprises), etc.

- Communication as a Service (CaaS): audio/video communications, e-mail, instant messaging, data sharing (web conference).

– Network as a Service (NaaS): managed Internet (guaranteed speed, availability, etc.), virtualized networks (VPNs) coupled with cloud computing services, flexible and on-demand bandwidth [1].

3. NEW NETWORK STORAGE TECHNOLOGY
Network Storage technology play a role to sustainable ICT. The new storage technologies are using the network protocols and server storage mechanism. Some important technologies are:
3.1 Network Attached storage system

It is a Cloud data storage system. The NAS systems are server configured with software designed specifically for storing and providing access to files over a LAN, using TCP/IP over Ethernet protocols. NAS is 4-16 TB. NAS do not correspond to the death omen for small and medium-sized businesses (SMB) network-attached storage (NAS). In fact, it is expected to reach sky high in revenue in 2015 by as much as $2 billion. This was supported by the survey conducted by In-Stat, a market research company that stated that for every 10 SMB users 7 of them make use of the NAS systems. SMB shipments in 2010 grew by 46.5% [2].

Fig-1. NAS Architecture [3]

3.2 Storage area Network(SAN)
A storage area network (SAN) is a dedicated network that provides access to consolidated, block level data storage. SANs are primarily used to make storage devices, such as disk arrays, tape libraries, and optical jukeboxes, accessible to servers so that the devices appear like locally attached devices to the operating system. A SAN typically has its own network of storage devices that are generally not accessible through the local area network by other devices. The cost and complexity of SANs dropped in the early 2000s to levels allowing wider adoption across both enterprise and small to medium sized business environments [4].

Fig-2 SAN Architecture [3]

A SAN does not provide file abstraction, only block-level operations. However, file systems built on top of SANs do provide file-level access, and are known as SAN file systems or shared disk file systems. Historically, data centers first created "islands" of SCSI disk arrays as direct-attached storage (DAS), each dedicated to an application, and visible as a number of "virtual hard drives" (i.e. LUNs). Essentially, a SAN consolidates such storage islands together using a high-speed network. Sharing storage usually simplifies storage administration and adds flexibility since cables and storage devices do not have to be physically moved to shift storage from one server to another.

3.3 RAID
RAID stands for describe a Redundant Array of Inexpensive Disks, a technology that allowed computer users to achieve high levels of storage reliability from low-cost and less reliable PC-class disk-drive components, via the technique of arranging the devices into arrays for redundancy[5] .
RAID is not a good alternative to backing up data. Data may become damaged or destroyed without harm to the drive(s) on which they are stored. For example, part of the data may be overwritten by a system malfunction; a file may be damaged or deleted by user error or malice and not noticed for days or weeks; and, of course, the entire array is at risk of physical damage [5]. Fig-3 RAID Architecture [6]

3.4 IP Storage
The growth of storage area networks (SANs) and the pervasiveness of the Internet Protocol (IP) are driving interest in using IP-based networks to transport block storage traffic. Referred to as IP Storage, early implementations are beginning to appear. Internet Protocol (IP) storage refers to a group of technologies that allow block-level storage data to be transmitted over an IP-based network. There are two key concepts in this definition: the use of IP and block-level storage. Transferring block-level storage data over a networked topology is not new. Today's storage area networks (SANs) use Fibre Channel (FC) technology to do just that. However, new IP storage protocols will enable SANs to be completely constructed and interconnected using prevalent IP-enabled technologies such as Ethernet [7].
Transferring block-level storage data over a networked topology is not new. Today's storage area networks (SANs) use Fiber Channel (FC) technology to do just that. However, new IP storage protocols will enable SANs to be completely constructed and interconnected using prevalent IP-enabled technologies such as Ethernet.
The use of IP to transfer storage data is also not a new concept. Familiar protocols such as Common Internet File System (CIFS) and Network File System (NFS) have been used to access file-level storage data over IP networks for years [8]. Fig-4 IP storage Architecture [9]
4. SECURITY MODEL OF PORTABLE STORAGE
4.1 Security Model of Trust Domains
The basic working principle of the TNC architecture is to implement network access control for terminals based on the division of trust domains and the identity and attestation integrity of a device. According to the working principle of the TNC, the management system for portable storage devices can help to expand the credibility of a system to the computer USB bus. The overall architecture of a trusted network system is shown in Fig-5[10].

Fig-5 Security model of trust domain 4.2 Security Model Of Portable Device
Based on the smart card technology, the new portable storage device consists of the CPU, memory, encryption coprocessor, Random Number Generator, fingerprint processing module, Chip Operating System (COS), and chip file system. The only identity file of the portable storage device is stored inside the device and is used to prove its identity to terminals within trust domains [10].

Fig-6 Security Model of Portable Device [11]

It provides a secure browser as part of the Secure Enterprise Workspace with secure storage, data-leakage protection (DLP) and administrative policy control. The secure browser enables access to approved Intranet sites and forms a direct App- Tunnel to an easily deployed gateway inside your DMZ. This simple solution extends the trust and control of your internal network out to users’ mobile devices through the industries ONLY secure Windows Integrated Authentication. For security conscious organizations authentication can include 2-factor methods with PKI certificates or One Time Password (OTP) token [12].

4.3 Security Model Of Untrusted Domains
The security for a production computer in an untrusted domain or workgroup is provided by using a local user account. The DPM agent uses Windows Challenge/Response (NTLM) authentication by using the local user credentials that are specified following the installation of the DPM agent on the protected computer [13].Computers in untrusted domains or workgroups require local installation of the DPM agent. They must then be added to DPM by using the Install Agent Wizard, and by providing the same credentials that were specified when configuring the DPM agent by using SetDpmServer with the –is NonDomainServer parameter after the agent is installed on the protected computer[13].

Fig-7 Model Of Untrusted Domains 5. STORAGE DEVICE SECURITY COMPARISON TABLE
SN Comparison Features / Properties Network attached storage Storage area network IP Storage 1. Reliability Maximum Minimum Minimum 2. Capacity Maximum Minimum Minimum 3. Durability Maximum Minimum Minimum 4. Usability Publicly Publicly Publicly 5. Security Best Best Good 6. Security Model New New New 7. Green Computing Supported Supported Supported

The comparison table is shown “why we are use the new storage technology” .The new technology is best for security purpose and also support the “green computing” because these are use the server storage directly. 4. CONCLUSION
In this paper, we studied the problems of data security in cloud data storage, which is essentially a distributed storage system. The analysis considered both public and private clouds and included energy consumption in switching and transmission as well as data processing and data storage. This paper will help the researchers to have a clear understanding of Cloud Computing with Green Computing.

5.REFERENCES

[1].Cloud computing in Africa situation and perspectives ITU April2012 www.itu.int .
[2].Cloudtimes.org/2011/05/25/smb-nas-system-notthreatened-by-cloud-storage/
[3].IBM Storage Networking June 2001 by David Sacks IBM Storage Consultant
[4].en.wikipedia.org/wiki/Storage_area_network.
[5].WWW.webtop.com.au/hosting-raid-10 .
[6].WWW.Google.com .
[7].WWW.wikipidiya.edu.in .
[8].WWW.dell.Com/Content/topics/global.aspx/power/en/ps4901_ipstorage?c=us&|=en&cs=28
[9].en.wikipidia.org/wiki/storage_area_network .
[10].Tongyang wang, Pengfei Yu, Xinfang Zhang, Junjun Wu. Research on a Data Ferrying Security Model of Portable Storage Device. Proceeding of the 2009 International Symposium on Web Information system and Applications (WISA’09) Nachang, P.R.China, May22-24, 2009, pp.424-428 .
[11].Reaserch on a Data Ferrying Security Model for portable storage device, ISBN 978-952-5726-008 , Proceeding of the 2009 International Symposium web information system and application (WISA’ 09) Nachang P.R. China , May 22-24,2009, PP.424-428.
[12].Liu He, Zhang Yong-zheng , Yu Zong . Research on Management of USB storage Device based on Trusted Network Connect (TNC) Architecture. Microcomputer Information , 2008, 24(5-3) : 90-92.
[13].Trusted Computing Group (TCG). TCG Trusted Network connect (TNC) Architecture for Interoperability specification (version 1.0 ) [z] 2005-03.
[14].Publish in: Parallel and distributed systems, IEEE Transactions on (volume. PP, issue: 99) ISSN:1045-9219.
[15].http://green.wikia.com/wiki/Green_Computing, visited on 8,March,2013.