云计算环境中的虚拟机同驻安全问题综述

在云计算环境中，为了实现资源共享，不同租户的虚拟机可能运行在同一台物理机器上，即虚拟机同驻，这将带来新的安全问题。为此，文章重点讨论同驻虚拟机所面临的一些新的安全威胁，包括资源干扰、隐蔽通道/侧信道、拒绝服务与虚拟机负载监听等，介绍现有虚拟机同驻探测方法，总结针对虚拟机同驻威胁的四种防御思路，并分析未来的研究趋势。

Review on Co-residency Security Issues of Virtual Machines in Cloud Computing

In cloud computing, in order to achieve resource sharing, virtual machines (VMs) of different tenants might be scheduled to run on the same physical machine, namely VMs co-residency, which would bring many new security issues. Therefore, security threats due to VMs co-residency, including resources interference, covert or side channel, denial of service and virtual machine load monitoring were reviewed in this paper. Besides, existing detection methods of co-residency were introduced, four kinds of defense about co-residency were summarized and further trends were also pointed out.