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Cloud computing is a technology that is built on the theory of virtualization-the idea to allow multiple virtual machines to share the resources of a host. One of the features of virtualization is live migration. This feature will allow one or more virtual machines to be migrated from one host to another without interfering with applications running on those virtual machines. However, there are many security issues associated with virtual machine live migration, which discourages many IT managers of taking advantage of this technology. This survey discusses live migration security issues, along with possible attacks before, during, and after migration. In addition, this survey discovers some known methodologies that aim to secure virtual machine live migration.