The growing popularity of the cloud computing model has been accompanied by a great deal of discussion, and some concrete action, regarding security concerns related to the use of computing, storage, networking and services infrastructure which, by definition, is shared among multiple end customers. While the classic siloed, single-tenant server model quite often involves the use of shared networking and ancillary services infrastructure, such as DNS, bringing together the application logic and proprietary data of multiple organizations on the same computing/networking/storage substrate has highlighted these concerns, and brought them to the forefront for many IT professionals and executives worldwide.