International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Cloud computing is an emerging technology which provides a highly scalable, flexible, cost-effective, and proven delivery platform for providing business or consumer IT services over the Internet. Clouds are very complex pay-as-you-go systems. In cloud computing the data are travelling over multiple clouds and are stored in different data centers. Data security is the main issue here. This paper uses different levels of security over sensitive data using cryptographic algorithms. This system is implemented using CloudSim toolkit. The proposed system enhances the data security in clouds.