| CHAPTER | |
| 21 | Unix Security |
From the time that Unix was first developed at the AT&T’s Bell Labs in 1969 by Ken Thompson and Dennis Ritchie until it was later released in 1975, the Internet as we now know it was not around. Most computer systems lived in virtual isolation from each other, with people directly connecting to the system that they wanted to use. The U.S. Department of Defense commissioned its Advanced Research Projects Agency to design a network to link computers together, and a military contractor known as BBN Technologies (named after founders and MIT professors Bolt, Beranek, and Newman) was awarded the contract to build that network in 1969. The result became known as ARPANET, which became operational in 1975.
As the ...
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