International Journal of Current Trends in Engineering & Research (IJCTER) e-ISSN 2455–1392 Volume 2 Issue 4, April 2016 pp. 84 - 92 Scientific Journal Impact Factor : 3.468 http://www.ijcter.com @IJCTER-2015, All rights Reserved 84 DATA SECURITY IN CLOUD COMPUTING Ch. Chakradhara Rao 1 , A.V.Ramana 2 1 CSE Department, GMRIT, Rajam, India 2 IT Department, GMRIT, Rajam, India Abstract—Cloud Computing is current buzzword in the market Confidentiality, Integrity, Availability, Authenticity, and Privacy are essential concerns for both Cloud providers and consumers as well. Security in Cloud computing is an important and critical aspect, and has numerous issues and problem related to it. Cloud service provider and the cloud service consumer should make sure that the cloud is safe enough from all the external threats so that the customer does not face any problem such as loss of data or data theft. There is also a possibility where a malicious user can penetrate the cloud by impersonating a legitimate user, thus infecting the entire cloud and affects many customers who are sharing the infected cloud. In this we will discuss how to provide security for the data from the unauthorized users and provide integrity to the users. Keywords—Cloud Computing, Data Integrity, Confidentiality, AES, Steganography I. INTRODUCTION Cloud computing is a model for convenient and on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort. In simple words, Cloud Computing is the combination of a technology, platform that provides hosting and storage service on the Internet. Main goal of the cloud computing is to provide scalable and inexpensive on-demand computing infrastructures with good quality of service levels. Many companies developing and offering cloud computing products and services but have not properly considered the implications of processing, storing and accessing data in a shared and virtualized environment. In fact, many developers of cloud-based applications struggle to include security. In other cases, developers simply cannot provide real security with currently affordable technological capabilities. Cloud computing is sharing of resources on a larger scale which is cost effective and location independent. Resources on the cloud can be used by the client and deployed by the vendor such as amazon, google, IBM, salesforce, zoho, rackspace, Microsoft. It also shares necessary software‘s and on-demand tools for various IT Industries. Benefits of Cloud computing are enormous. The most important one is that the customers don‘t need to buy the resource from a thi rd party vendor, instead they can use the resource and pay for it as a service thus helping the customer to save time and money. Cloud is not only for Multinational companies but it‘s also being used by Small and medium enterprises. The architecture of the Cloud Computing involves multiple cloud components interacting with each other about the various data they are holding on too, thus helping the user to get to the required data on a faster rate. When it comes to cloud it is more focused upon the frontend and the back end. The front end is the User who requires the data, whereas the backend is the numerous data storage device, server which makes the Cloud. There are three types of cloud according to their usage. They are private cloud, public cloud and hybrid cloud. The private cloud is owned by a single organization and public clouds are shared on a larger scale. Private cloud provides better control and more flexibility. Hybrid cloud is a combination of Private cloud and Public Cloud which is used by most of the industries. The advantages of cloud computing may be very appealing but nothing is perfect. Cloud got many issues when it comes to security especially on Data theft, Data loss and Privacy. The parameters that affect the security of the cloud and problems faced by cloud service provider and cloud service consumer such as data, privacy, infected application and security issues.