Abstract: A communication network implements a “resistance cell architecture.” Each cell in the architecture comprises communication equipment such as a cell communication device coupled to one or more computers or terminals. Each cell is only permitted to communicate directly with certain predetermined other cells in the architecture. If a cell has a communication to be transmitted to a cell to which it does not directly communicate, the communication will be sent from one cell to another until the communication reaches the intended recipient. A security breach in the network can quickly, easily and effectively be isolated using the resistance cell architecture. For example, once a security is detected, the cell through which the security intrusion is detected can be deactivated or destroyed thereby preventing communications from the infected cell or branch of the resistance cell architecture to reach other parts of the network.

Abstract: A security system includes a data storage device in which data or other information to be protected is stored. The data storage device, control logic, and other components are contained in a sealed first inner housing. The data storage device stores the data to be protected. The first inner housing is contained within a sealed second inner housing by a plurality of support structures which create an interstitial volume surrounding the first inner enclosure. Both inner housings are contained within an outer housing. A vacuum is created in the interstitial volume between the two inner housings. Both inner housings are sealed thereby precluding air from entering the interstitial volume and defeating the vacuum. One or more pressure sensors monitor the vacuum pressure. If an attempt is made to access the first inner housing, by drilling through the second inner housing or otherwise defeating the second inner housing's seal, the pressure of the interstitial volume will change.