Patent ID: 7519181

Claim:
A communication network system for delivering encrypted broadcast content to authorized devices comprising: a device authorization unit for authorizing devices within a geographic area via cryptographic handshaking; a timer for timing the cryptographic handshaking process; a content delivery unit for delivering encrypted broadcast content only to authorized devices within said geographic area; and one or more device proxies, wherein said device proxies are authorized devices within the geographic area and are enabled to send encrypted broadcast content to authorized devices outside of said geographic area; wherein the timer identifies authorized devices by length of time transmission; wherein the device proxies comprise hardware facilities; wherein the hardware facilities use location information to enforce network cluster proximity requirements; wherein the hardware facilities use information from the authorized devices to enforce network cluster proximity requirements; wherein the device proxies comprise a home network system which communicates with other network compliant devices to enforce network cluster proximity requirements; wherein one or more devices are added to the network cluster; wherein mean and standard deviation of round-trip times for each new device are measured; wherein a new, potential maximum round-trip time is calculated as the mean plus two times the standard deviation; wherein the potential maximum round-trip time is less than a current maximum round-trip time; wherein the potential maximum round-trip time is adopted as a new current maximum round-trip time.