A STUDY ON CLOUD COMPUTING ITS SECURITY ISSUES


Jaspreet kaur
DEPARTMENT OF COMPUTER SCIENCE ENGINEERING, SANT BABA BHAG SINGH UNIVERSITY, JALANDHAR, INDIA
Abstract
Cloud computing is one of the most widely used IT Technology. It plays a very important part in our daily life. Cloud delivered the online services to the users. Cloud computing gives services to clients according to their requirements. It provides data storage service to users which is one of the prominent service. An owner can put their data on cloud server and can access their data from anywhere whenever they want. As everyone putting their data on cloud, there is more concern about security of data. There are many security challenges present in cloud computing. In this paper, we will show some security issue related to cloud.
Keywords- Cloud computing, Models, Security Issues
1. Introduction
Cloud Computing is internet based service which provide services to the customer according to their requirements. Cloud delivered services to the users on pay per use base. Clients can access their data from anywhere and anytime.
In traditional times, when there are no online services available, companies spent more money and cost to deal with resources and services. Cloud computing overcome the limitations of traditional system. Now, more and more individual and businesses are attracted towards cloud because of its increased reliability, greater scalability, flexibility and low cost.
There are two types of cloud computing models- Deployment models and Service models. The Deployment models are of four types. Private, Public, Hybrid and community cloud. The service models categorized as Infrastructure as a service (IAAS), Platform as a service (PAAS), Software as a service (SAAS). With the help of these models cloud computing work. As everyone shifting towards the cloud, so security of a data is big concern. There are many security challenges and threats present in cloud.

2. Cloud deployment models
Cloud deployment models tell us about the nature of the cloud, where the servers is located and who control the servers. The cloud deployment models are of four types: – Public cloud, Private Cloud, Hybrid Cloud, Community Cloud.
2.1 Public Cloud
Public Cloud delivered resources and services to everyone. This cloud is open for public. It provides services to clients according to their demand. There is no need to purchase the Infrastructure, instead of purchasing we can hire them. The users are unaware of where the Infrastructure are located. The cloud service provider handled all the services. Public cloud has many benefits like managing load, low operational cost etc.
2.2 Private Cloud
Private cloud is more secure than Public cloud. Private cloud is suited for those which required more security. In public cloud only authorized users can access the services and resources. The organization has complete control over their data. This cloud hosted with two ways i.e. internally or externally. In internally hosted cloud the cloud is hosted within the organization and the organization has complete control over their information. In externally hosted cloud the organizations data is handled by third party. As compare to Public Cloud the Private cloud is costlier.
2.3 Hybrid cloud
Hybrid cloud is mixture of Public Cloud and Private cloud. This cloud is suited for those organizations which want both the services of public and private cloud. This cloud also hosted the data externally or internally. According to the demand of clients this cloud exchanges the workload between Public cloud and Private cloud.
2.4 Community Cloud
Community Cloud is shared among the several organizations which have the same motive. This cloud is also hosted by two ways i.e. internally or externally. Community cloud is cost efficient because the costs are shared by several organizations.




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