A Survey on data security challenges in multi cloud environment

Ensuring the security and privacy of data stored in cloud is one of critical requirement for enterprises. Recently multi cloud is proposed as a solution for ensuring securit., privacy and high availability of data for enterprises. Multi cloud is an integration of public, private and managed clouds with a single interface to the users. Data to be stored in the cloud is partitioned across different clouds in multi cloud based on the reliability of the cloud and degree of sensitivity of the data. This survey studies the existing multi cloud based security solutions to identify the open issues and scope for further improvement.