A method and apparatus for preventing exchange of viruses. Preexisting content is maintained for a device in a first location. New content associated with the device is placed in a second location, wherein the new content is an update to the preexisting content. The preexisting content and the new content...http://www.google.de/patents/US7086090?utm_source=gb-gplus-sharePatent US7086090 - Method and system for protecting pervasive devices and servers from exchanging viruses