Thanks for sharing, interesting indeed!..
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This was in 1986, when Jim Christy, special agent, chief of the Air Force Office of Special Investigations computer crime unit, answered a phone call from Cliff Stoll. Stoll, an astronomer at the Lawrence Berkeley National Laboratory in California, had uncovered an intrusion into defense department networks, ultimately involving 400 MILNET (military network) computers across the United States, Germany and other countries. This network was part of the ARPANET internetwork designated for unclassified United States Department of Defense traffic.
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The intrusion, subject of Cliff Stoll's best selling book The Cuckoo's Egg, published in 1989, was ultimately tracked to an entry point at a Mitre installation in Bedford, Mass.
I read that book - it was very interesting!!..