United States Patent       6,947,978
Huffman ,   et al.     September 20, 2005

Method for geolocating logical network addresses

Abstract

Method for geolocating logical network addresses on electronically switched
dynamic communications networks, such as the Internet, using the time
latency of communications to and from the logical network address to
determine its location. Minimum round-trip communications latency is
measured between numerous stations on the network and known network
addressed equipment to form a network latency topology map. Minimum
round-trip communications latency is also measured between the stations and
the logical network address to be geolocated. The resulting set of minimum
round-trip communications latencies is then correlated with the network
latency topology map to determine the location of the network address to be
geolocated.

Inventors:     Huffman; Stephen Mark (Sandy Spring, MD); Reifer; Michael
Henry (Columbia, MD)
Assignee:     The United States of America as represented by the Director,
National Security Agency (Washington, DC)
Appl. No.:     752898
Filed:     December 29, 2000

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1
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N/6,947,978



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