Date Added: Aug 2009
Virtualization enables multiple networks, each customized for a particular purpose, to run concurrently over a shared substrate. One such model for managing these virtual net-works is to create a hosting platform where companies can deploy services by leasing a portion of several physical routers. While lowering the barrier for innovation in the network, this model introduces new security concerns. This paper examines the issue of accountability in this setting of hosted virtual networks. That is, how a service provider can know its software is running without modification and that the infrastructure provider's physical router is forwarding packets as instructed with the quality of service promised.