D.VINOTHKUMAR et al, International Journal of Computer Science and Mobile Computing, Vol.8 Issue.9, September- 2019, pg. 239-244 © 2019, IJCSMC All Rights Reserved 239 Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology ISSN 2320–088X IMPACT FACTOR: 6.199 IJCSMC, Vol. 8, Issue. 9, September 2019, pg.239 – 244 Study on Cloud Computing Security from Single to Multi-Clouds D.VINOTHKUMAR 1 ; DR. A.V.SENTHILKUMAR 2 ¹PG Student, PG & Research Department of Computer Applications, Hindusthan College of Arts and Science Coimbatore, Tamilnadu, India ²Director & Professor, PG & Research Department of Computer Applications, Hindusthan College of Arts and Science, Coimbatore, Tamilnadu, India 1 vinothkumard420@gmail.com; 2 avsenthilkumar@yahoo.com _______________________________________________________________________________________ Abstract-- The project entitled as “CLOUD COMPUTING SECURITY FROM SINGLE AND MULTI- CLOUDS”. Cloud computing has increased in many organizations due to remote data access. It provides benefits in such as low cost and easy accessibility of data. The security factor of cloud computing is a major concern in the cloud computing environment, as users store sensitive information with cloud storage but these providers may be untrusted. While dealing with “single cloud” providers has become less popular with customers due to risks of service availability failure and the possibility of malicious activities in the single cloud. This led to the movement towards “multi- clouds”, “interclouds” or “cloud-of-clouds” has emerged. This work is a genuine attempt to promote the use of multi-clouds due to its ability to reduce security risks that affect the cloud computing user. ________________________________________________________________________________________ I. INTRODUCTION Cloud computing is the delivery of different services through the Internet. These resources include tools and applications like data storage, servers, databases, networking, and software. Cloud computing is a popular option for people and businesses for a number of reasons including cost savings, increased productivity, speed and efficiency, performance, and security. Cloud computing is named as such because the information being accessed is found remotely in the cloud or a virtual space. Companies that provide cloud services enable users to store files and applications on remote servers and then access all the data via the Internet. This means the user is not required to be in a specific place to gain access to it, allowing the user to work remotely.